Common Weakness Enumeration

CWE-287

Discouraged

Improper Authentication

Abstraction: Class · Status: Draft

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

6877 vulnerabilities reference this CWE, most recent first.

GHSA-P73F-R2R7-633J

Vulnerability from github – Published: 2026-09-15 21:32 – Updated: 2026-09-15 21:32
VLAI
Details

Vulnerability in the Oracle Business Intelligence Enterprise Edition product of Oracle Analytics (component: Platform Security). The supported version that is affected is 12.2.1.4.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Business Intelligence Enterprise Edition. Successful attacks of this vulnerability can result in takeover of Oracle Business Intelligence Enterprise Edition. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-83283"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-15T20:18:40Z",
    "severity": "CRITICAL"
  },
  "details": "Vulnerability in the Oracle Business Intelligence Enterprise Edition product of Oracle Analytics (component: Platform Security).   The supported version that is affected is 12.2.1.4.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Business Intelligence Enterprise Edition.  Successful attacks of this vulnerability can result in takeover of Oracle Business Intelligence Enterprise Edition. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).",
  "id": "GHSA-p73f-r2r7-633j",
  "modified": "2026-09-15T21:32:29Z",
  "published": "2026-09-15T21:32:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-83283"
    },
    {
      "type": "WEB",
      "url": "https://www.oracle.com/security-alerts/cspusep2026.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-P747-QC5P-773R

Vulnerability from github – Published: 2026-03-20 20:43 – Updated: 2026-03-25 20:34
VLAI
Summary
Vikunja has TOTP Reuse During Validity Window
Details

Summary

Any user that has enabled 2FA can have their TOTP reused during the standard 30 second validity window.

Details

The below code is called when a user that has 2FA is authenticating to the application. Once they submit a valid username-password-totp combination, the user gets authenticated. If that same TOTP is used for the same user's account again within the validity window, it will allow the other session to authenticate successfully.

Source: pkg/user/totp.go:128

// ValidateTOTPPasscode validated totp codes of users.
func ValidateTOTPPasscode(s *xorm.Session, passcode *TOTPPasscode) (t *TOTP, err error) {
    t, err = GetTOTPForUser(s, passcode.User)
    if err != nil {
        return
    }

    if !totp.Validate(passcode.Passcode, t.Secret) {
        return nil, ErrInvalidTOTPPasscode{Passcode: passcode.Passcode}
    }

    return
}

Section 6.5.1 within the Authentication section of the OWASP ASVS recommends multiple checks, some of which involving TOTPs:

Verify that lookup secrets, out-of-band authentication requests or codes, and time-based one-time passwords (TOTPs) are only successfully usable once.

The OWASP WSTG also references this as one of their checks to look for:

Can the OTPs be used more than once?

PoC

https://github.com/user-attachments/assets/19d3b4c3-c219-4f59-b57d-45c9f6a264c8

Impact

Any user who uses 2FA could be impacted if their traffic is able to be captured, they're phished/social engineered, or other methods of attack. This disrupts one layer of the defense-in-depth model surrounding 2FA.

Similar CVEs

Remediation

Store a deny-list of TOTP codes for their validity windows and check submitted codes against it to ensure none are being reused. After their validity window has closed, the 2FA code can be removed from the list.

Show details on source website

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c 2.2.1"
      },
      "package": {
        "ecosystem": "Go",
        "name": "code.vikunja.io/api"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-33473"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-20T20:43:00Z",
    "nvd_published_at": "2026-03-24T16:16:33Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\nAny user that has enabled 2FA can have their TOTP reused during the standard 30 second validity window.\n\n### Details\nThe below code is called when a user that has 2FA is authenticating to the application. Once they submit a valid username-password-totp combination, the user gets authenticated. If that same TOTP is used for the same user\u0027s account again within the validity window, it will allow the other session to authenticate successfully.\n\n**Source**: \u003cins\u003epkg/user/totp.go:128\u003c/ins\u003e\n```go\n// ValidateTOTPPasscode validated totp codes of users.\nfunc ValidateTOTPPasscode(s *xorm.Session, passcode *TOTPPasscode) (t *TOTP, err error) {\n\tt, err = GetTOTPForUser(s, passcode.User)\n\tif err != nil {\n\t\treturn\n\t}\n\n\tif !totp.Validate(passcode.Passcode, t.Secret) {\n\t\treturn nil, ErrInvalidTOTPPasscode{Passcode: passcode.Passcode}\n\t}\n\n\treturn\n}\n```\n\nSection 6.5.1 within the [Authentication](https://github.com/OWASP/ASVS/blob/master/5.0/en/0x15-V6-Authentication.md) section of the OWASP ASVS recommends multiple checks, some of which involving TOTPs:\n\n\u003e Verify that lookup secrets, out-of-band authentication requests or codes, and time-based one-time passwords (TOTPs) are only successfully usable once.\n\nThe OWASP WSTG also references this as one of their [checks](https://owasp.org/www-project-web-security-testing-guide/latest/4-Web_Application_Security_Testing/04-Authentication_Testing/11-Testing_Multi-Factor_Authentication) to look for:\n\n\u003e Can the OTPs be used more than once?\n\n### PoC\n\nhttps://github.com/user-attachments/assets/19d3b4c3-c219-4f59-b57d-45c9f6a264c8\n\n### Impact\nAny user who uses 2FA could be impacted if their traffic is able to be captured, they\u0027re phished/social engineered, or other methods of attack. This disrupts one layer of the defense-in-depth model surrounding 2FA.\n\n### Similar CVEs\n\n- [CVE-2025-6014](https://nvd.nist.gov/vuln/detail/CVE-2025-6014)\n- [CVE-2025-55003](https://nvd.nist.gov/vuln/detail/CVE-2025-55003)\n\n### Remediation\n\nStore a deny-list of TOTP codes for their validity windows and check submitted codes against it to ensure none are being reused. After their validity window has closed, the 2FA code can be removed from the list.",
  "id": "GHSA-p747-qc5p-773r",
  "modified": "2026-03-25T20:34:07Z",
  "published": "2026-03-20T20:43:00Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/go-vikunja/vikunja/security/advisories/GHSA-p747-qc5p-773r"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33473"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/go-vikunja/vikunja"
    },
    {
      "type": "WEB",
      "url": "https://vikunja.io/changelog/vikunja-v2.2.0-was-released"
    },
    {
      "type": "WEB",
      "url": "https://vikunja.io/changelog/vikunja-v2.2.2-was-released"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Vikunja has TOTP Reuse During Validity Window"
}

GHSA-P785-52CF-XGG7

Vulnerability from github – Published: 2022-05-24 16:44 – Updated: 2024-04-04 00:04
VLAI
Details

A default username and password in Dentsply Sirona Sidexis 4.2 and possibly others allows an attacker to gain administrative access to the application server.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2019-11081"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-04-24T15:29:00Z",
    "severity": "CRITICAL"
  },
  "details": "A default username and password in Dentsply Sirona Sidexis 4.2 and possibly others allows an attacker to gain administrative access to the application server.",
  "id": "GHSA-p785-52cf-xgg7",
  "modified": "2024-04-04T00:04:35Z",
  "published": "2022-05-24T16:44:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-11081"
    },
    {
      "type": "WEB",
      "url": "https://bastolino.de/sidexis4vuln.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-P7J9-6RJW-4CW5

Vulnerability from github – Published: 2022-05-14 01:42 – Updated: 2022-05-14 01:42
VLAI
Details

HPE StorageWorks XP7 Automation Director (AutoDir) version 8.5.2-02 to earlier than 8.6.1-00 has a local and remote authentication bypass vulnerability that exposed the user authentication information of the storage system. This problem sometimes occurred under specific conditions when running a service template.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2018-7108"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2018-09-27T18:29:00Z",
    "severity": "MODERATE"
  },
  "details": "HPE StorageWorks XP7 Automation Director (AutoDir) version 8.5.2-02 to earlier than 8.6.1-00 has a local and remote authentication bypass vulnerability that exposed the user authentication information of the storage system. This problem sometimes occurred under specific conditions when running a service template.",
  "id": "GHSA-p7j9-6rjw-4cw5",
  "modified": "2022-05-14T01:42:48Z",
  "published": "2022-05-14T01:42:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-7108"
    },
    {
      "type": "WEB",
      "url": "https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US\u0026docId=emr_na-hpesbst03879en_us"
    },
    {
      "type": "WEB",
      "url": "http://www.securitytracker.com/id/1041696"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-P7Q7-P4XF-XRPF

Vulnerability from github – Published: 2023-02-09 18:30 – Updated: 2025-03-24 21:30
VLAI
Details

The IHwAttestationService interface has a defect in authentication. Successful exploitation of this vulnerability may affect data confidentiality.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2022-48294"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-02-09T17:15:00Z",
    "severity": "HIGH"
  },
  "details": "The IHwAttestationService interface has a defect in authentication. Successful exploitation of this vulnerability may affect data confidentiality.",
  "id": "GHSA-p7q7-p4xf-xrpf",
  "modified": "2025-03-24T21:30:26Z",
  "published": "2023-02-09T18:30:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-48294"
    },
    {
      "type": "WEB",
      "url": "https://consumer.huawei.com/en/support/bulletin/2023/2"
    },
    {
      "type": "WEB",
      "url": "https://device.harmonyos.com/en/docs/security/update/security-bulletins-202302-0000001454769474"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-P7RG-RP2H-C9H8

Vulnerability from github – Published: 2022-05-17 05:06 – Updated: 2022-05-17 05:06
VLAI
Details

The Verizon Wireless Network Extender SCS-26UC4 and SCS-2U01 does not use CAVE authentication, which makes it easier for remote attackers to obtain ESN and MIN values from arbitrary phones, and conduct cloning attacks, by sniffing the network for registration packets.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2013-4877"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2013-07-18T16:51:00Z",
    "severity": "LOW"
  },
  "details": "The Verizon Wireless Network Extender SCS-26UC4 and SCS-2U01 does not use CAVE authentication, which makes it easier for remote attackers to obtain ESN and MIN values from arbitrary phones, and conduct cloning attacks, by sniffing the network for registration packets.",
  "id": "GHSA-p7rg-rp2h-c9h8",
  "modified": "2022-05-17T05:06:04Z",
  "published": "2022-05-17T05:06:04Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2013-4877"
    },
    {
      "type": "WEB",
      "url": "http://www.kb.cert.org/vuls/id/458007"
    },
    {
      "type": "WEB",
      "url": "http://www.kb.cert.org/vuls/id/BLUU-997M5B"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/61169"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GHSA-P7RW-CJJV-6CC4

Vulnerability from github – Published: 2022-05-14 02:40 – Updated: 2022-05-14 02:40
VLAI
Details

JSCAPE Secure FTP Applet 4.8.0 and earlier does not ask the user to verify a new or mismatched SSH host key, which makes it easier for remote attackers to perform man-in-the-middle attacks.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2008-5124"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2008-11-18T00:30:00Z",
    "severity": "HIGH"
  },
  "details": "JSCAPE Secure FTP Applet 4.8.0 and earlier does not ask the user to verify a new or mismatched SSH host key, which makes it easier for remote attackers to perform man-in-the-middle attacks.",
  "id": "GHSA-p7rw-cjjv-6cc4",
  "modified": "2022-05-14T02:40:42Z",
  "published": "2022-05-14T02:40:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2008-5124"
    },
    {
      "type": "WEB",
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/43300"
    },
    {
      "type": "WEB",
      "url": "http://secunia.com/advisories/30822"
    },
    {
      "type": "WEB",
      "url": "http://securityreason.com/securityalert/4606"
    },
    {
      "type": "WEB",
      "url": "http://www.jscape.com/sftpapplet/docs/HTML/index.html?introhistory.html"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/archive/1/493569/100/0/threaded"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/archive/1/493652/100/0/threaded"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/29882"
    },
    {
      "type": "WEB",
      "url": "http://www.securitytracker.com/id?1020346"
    },
    {
      "type": "WEB",
      "url": "http://www.vupen.com/english/advisories/2008/1919/references"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GHSA-P829-FQ6P-P9CF

Vulnerability from github – Published: 2022-05-24 19:11 – Updated: 2022-05-24 19:11
VLAI
Details

The MiCollab Client service in Mitel MiCollab before 9.3 could allow an unauthenticated user to gain system access due to improper access control. A successful exploit could allow an attacker to view and modify application data, and cause a denial of service for users.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2021-32071"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-08-13T16:15:00Z",
    "severity": "CRITICAL"
  },
  "details": "The MiCollab Client service in Mitel MiCollab before 9.3 could allow an unauthenticated user to gain system access due to improper access control. A successful exploit could allow an attacker to view and modify application data, and cause a denial of service for users.",
  "id": "GHSA-p829-fq6p-p9cf",
  "modified": "2022-05-24T19:11:05Z",
  "published": "2022-05-24T19:11:05Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-32071"
    },
    {
      "type": "WEB",
      "url": "https://www.mitel.com/support/security-advisories"
    },
    {
      "type": "WEB",
      "url": "https://www.mitel.com/support/security-advisories/mitel-product-security-advisory-21-0005"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-P82R-CC76-F4X5

Vulnerability from github – Published: 2022-05-17 01:17 – Updated: 2022-05-17 01:17
VLAI
Details

NetApp Data ONTAP before 8.2.4, when operating in 7-Mode, allows remote attackers to bypass authentication and (1) obtain sensitive information from or (2) modify volumes via vectors related to UTF-8 in the volume language.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2015-7746"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2017-09-01T13:29:00Z",
    "severity": "CRITICAL"
  },
  "details": "NetApp Data ONTAP before 8.2.4, when operating in 7-Mode, allows remote attackers to bypass authentication and (1) obtain sensitive information from or (2) modify volumes via vectors related to UTF-8 in the volume language.",
  "id": "GHSA-p82r-cc76-f4x5",
  "modified": "2022-05-17T01:17:01Z",
  "published": "2022-05-17T01:17:01Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2015-7746"
    },
    {
      "type": "WEB",
      "url": "https://kb.netapp.com/support/index?page=content\u0026id=9010049"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-P83J-MXPW-GQPJ

Vulnerability from github – Published: 2026-05-14 18:32 – Updated: 2026-05-14 18:32
VLAI
Details

May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and fixed after the was disclosed in February 2026. This new advisory is for a new vulnerability in the control connection handshaking. The section of this advisory includes Show Control Connections guidance to help with system checks. 

A vulnerability in the peering authentication in Cisco Catalyst SD-WAN Controller, formerly SD-WAN vSmart, and Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an unauthenticated, remote attacker to bypass authentication and obtain administrative privileges on an affected system. This vulnerability exists because the peering authentication mechanism in an affected system is not working properly. An attacker could exploit this vulnerability by sending crafted requests to the affected system. A successful exploit could allow the attacker to log in to an affected Cisco Catalyst SD-WAN Controller as an internal, high-privileged, non-root user account. Using this account, the attacker could access NETCONF, which would then allow the attacker to manipulate network configuration for the SD-WAN fabric.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-20182"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-14T17:16:19Z",
    "severity": "CRITICAL"
  },
  "details": "May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and fixed after the  was disclosed in February 2026. This new advisory is for a new vulnerability in the control connection handshaking. The  section of this advisory includes Show Control Connections guidance to help with system checks.\u0026nbsp;\n\nA vulnerability in the peering authentication in Cisco Catalyst SD-WAN Controller, formerly SD-WAN vSmart, and Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an unauthenticated, remote attacker to bypass authentication and obtain administrative privileges on an affected system.\nThis vulnerability exists because the peering authentication mechanism in an affected system is not working properly. An attacker could exploit this vulnerability by sending crafted requests to the affected system. A successful exploit could allow the attacker to log in to an affected Cisco Catalyst SD-WAN Controller as an internal, high-privileged, non-root user account. Using this account, the attacker could access NETCONF, which would then allow the attacker to manipulate network configuration for the SD-WAN fabric.",
  "id": "GHSA-p83j-mxpw-gqpj",
  "modified": "2026-05-14T18:32:56Z",
  "published": "2026-05-14T18:32:56Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-20182"
    },
    {
      "type": "WEB",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa-EHchtZk"
    },
    {
      "type": "WEB",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa2-v69WY2SW"
    },
    {
      "type": "WEB",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20182"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

Mitigation
Architecture and Design

Strategy: Libraries or Frameworks

Use an authentication framework or library such as the OWASP ESAPI Authentication feature.

CAPEC-114: Authentication Abuse

An attacker obtains unauthorized access to an application, service or device either through knowledge of the inherent weaknesses of an authentication mechanism, or by exploiting a flaw in the authentication scheme's implementation. In such an attack an authentication mechanism is functioning but a carefully controlled sequence of events causes the mechanism to grant access to the attacker.

CAPEC-115: Authentication Bypass

An attacker gains access to application, service, or device with the privileges of an authorized or privileged user by evading or circumventing an authentication mechanism. The attacker is therefore able to access protected data without authentication ever having taken place.

CAPEC-151: Identity Spoofing

Identity Spoofing refers to the action of assuming (i.e., taking on) the identity of some other entity (human or non-human) and then using that identity to accomplish a goal. An adversary may craft messages that appear to come from a different principle or use stolen / spoofed authentication credentials.

CAPEC-194: Fake the Source of Data

An adversary takes advantage of improper authentication to provide data or services under a falsified identity. The purpose of using the falsified identity may be to prevent traceability of the provided data or to assume the rights granted to another individual. One of the simplest forms of this attack would be the creation of an email message with a modified "From" field in order to appear that the message was sent from someone other than the actual sender. The root of the attack (in this case the email system) fails to properly authenticate the source and this results in the reader incorrectly performing the instructed action. Results of the attack vary depending on the details of the attack, but common results include privilege escalation, obfuscation of other attacks, and data corruption/manipulation.

CAPEC-22: Exploiting Trust in Client

An attack of this type exploits vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by communicating directly with the server where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.

CAPEC-57: Utilizing REST's Trust in the System Resource to Obtain Sensitive Data

This attack utilizes a REST(REpresentational State Transfer)-style applications' trust in the system resources and environment to obtain sensitive data once SSL is terminated.

CAPEC-593: Session Hijacking

This type of attack involves an adversary that exploits weaknesses in an application's use of sessions in performing authentication. The adversary is able to steal or manipulate an active session and use it to gain unathorized access to the application.

CAPEC-633: Token Impersonation

An adversary exploits a weakness in authentication to create an access token (or equivalent) that impersonates a different entity, and then associates a process/thread to that that impersonated token. This action causes a downstream user to make a decision or take action that is based on the assumed identity, and not the response that blocks the adversary.

CAPEC-650: Upload a Web Shell to a Web Server

By exploiting insufficient permissions, it is possible to upload a web shell to a web server in such a way that it can be executed remotely. This shell can have various capabilities, thereby acting as a "gateway" to the underlying web server. The shell might execute at the higher permission level of the web server, providing the ability the execute malicious code at elevated levels.

CAPEC-94: Adversary in the Middle (AiTM)

An adversary targets the communication between two components (typically client and server), in order to alter or obtain data from transactions. A general approach entails the adversary placing themself within the communication channel between the two components.