CWE-295
AllowedImproper Certificate Validation
Abstraction: Base · Status: Draft
The product does not validate, or incorrectly validates, a certificate.
2267 vulnerabilities reference this CWE, most recent first.
GHSA-M6FW-CR7C-RH9V
Vulnerability from github – Published: 2022-05-17 02:39 – Updated: 2025-04-20 03:39The "Peoples Bank Tulsa" by Peoples Bank - OK app 3.0.2 -- aka peoples-bank-tulsa/id1074279285 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.
{
"affected": [],
"aliases": [
"CVE-2017-9600"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-06-16T12:29:00Z",
"severity": "MODERATE"
},
"details": "The \"Peoples Bank Tulsa\" by Peoples Bank - OK app 3.0.2 -- aka peoples-bank-tulsa/id1074279285 for iOS does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.",
"id": "GHSA-m6fw-cr7c-rh9v",
"modified": "2025-04-20T03:39:14Z",
"published": "2022-05-17T02:39:46Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-9600"
},
{
"type": "WEB",
"url": "https://medium.com/%40chronic_9612/advisory-44-credit-union-apps-for-ios-may-allow-login-credential-exposure-4d2f380b85c5"
},
{
"type": "WEB",
"url": "https://medium.com/@chronic_9612/advisory-44-credit-union-apps-for-ios-may-allow-login-credential-exposure-4d2f380b85c5"
}
],
"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-M6MG-MJQ2-V73R
Vulnerability from github – Published: 2022-05-24 19:11 – Updated: 2022-05-24 19:11The AWV component of Mitel MiCollab before 9.3 could allow an attacker to perform a Man-In-the-Middle attack due to improper TLS negotiation. A successful exploit could allow an attacker to view and modify data.
{
"affected": [],
"aliases": [
"CVE-2021-32069"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-08-13T16:15:00Z",
"severity": "MODERATE"
},
"details": "The AWV component of Mitel MiCollab before 9.3 could allow an attacker to perform a Man-In-the-Middle attack due to improper TLS negotiation. A successful exploit could allow an attacker to view and modify data.",
"id": "GHSA-m6mg-mjq2-v73r",
"modified": "2022-05-24T19:11:05Z",
"published": "2022-05-24T19:11:05Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-32069"
},
{
"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": []
}
GHSA-M732-8QWX-39WM
Vulnerability from github – Published: 2026-09-27 12:30 – Updated: 2026-10-02 21:31A failed X509_verify_cert call permanently plants an unverified attacker CA in the shared CertManager, bypassing certificate validation in every type-blind sibling consumer (native TLS, OCSP, CRL, direct CM verify). This affects version 5.8.4 through 5.9.2 of wolfSSL with the macros (OPENSSL_EXTRA && !NO_CERTS && !WOLFCRYPT_ONLY) defined or built with --enable-opensslextra and the application is specifically making calls to the X509_verify_cert function.
{
"affected": [],
"aliases": [
"CVE-2026-89135"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-27T10:16:59Z",
"severity": "MODERATE"
},
"details": "A failed X509_verify_cert call permanently plants an unverified attacker CA in the shared CertManager, bypassing certificate validation in every type-blind sibling consumer (native TLS, OCSP, CRL, direct CM verify). This affects version 5.8.4 through 5.9.2 of wolfSSL with the macros (OPENSSL_EXTRA \u0026\u0026 !NO_CERTS \u0026\u0026 !WOLFCRYPT_ONLY) defined or built with --enable-opensslextra and the application is specifically making calls to the X509_verify_cert function.",
"id": "GHSA-m732-8qwx-39wm",
"modified": "2026-10-02T21:31:57Z",
"published": "2026-09-27T12:30:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89135"
},
{
"type": "WEB",
"url": "https://github.com/wolfSSL/wolfssl/pull/11009"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-M74J-PP4X-R2G8
Vulnerability from github – Published: 2022-05-14 01:30 – Updated: 2022-05-14 01:30Cordaware bestinformed Microsoft Windows client before 6.2.1.0 is affected by insecure SSL certificate verification and insecure access patterns. These issues allow remote attackers to downgrade encrypted connections to cleartext.
{
"affected": [],
"aliases": [
"CVE-2019-6266"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-02-25T23:29:00Z",
"severity": "CRITICAL"
},
"details": "Cordaware bestinformed Microsoft Windows client before 6.2.1.0 is affected by insecure SSL certificate verification and insecure access patterns. These issues allow remote attackers to downgrade encrypted connections to cleartext.",
"id": "GHSA-m74j-pp4x-r2g8",
"modified": "2022-05-14T01:30:10Z",
"published": "2022-05-14T01:30:10Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-6266"
},
{
"type": "WEB",
"url": "https://www.detack.de/en/cve-2019-6265-6266"
}
],
"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-M7JQ-XVR4-F7XC
Vulnerability from github – Published: 2022-11-04 19:01 – Updated: 2022-11-08 19:00A vulnerability in Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper handling of certain TLS connections that are processed by an affected device. An attacker could exploit this vulnerability by establishing a large number of concurrent TLS connections to an affected device. A successful exploit could allow the attacker to cause the device to drop new TLS email messages that come from the associated email servers. Exploitation of this vulnerability does not cause the affected device to unexpectedly reload. The device will recover autonomously within a few hours of when the attack is halted or mitigated.
{
"affected": [],
"aliases": [
"CVE-2022-20960"
],
"database_specific": {
"cwe_ids": [
"CWE-295",
"CWE-400"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-11-04T18:15:00Z",
"severity": "HIGH"
},
"details": "A vulnerability in Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper handling of certain TLS connections that are processed by an affected device. An attacker could exploit this vulnerability by establishing a large number of concurrent TLS connections to an affected device. A successful exploit could allow the attacker to cause the device to drop new TLS email messages that come from the associated email servers. Exploitation of this vulnerability does not cause the affected device to unexpectedly reload. The device will recover autonomously within a few hours of when the attack is halted or mitigated.",
"id": "GHSA-m7jq-xvr4-f7xc",
"modified": "2022-11-08T19:00:23Z",
"published": "2022-11-04T19:01:10Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-20960"
},
{
"type": "WEB",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-dos-gdghHmbV"
},
{
"type": "WEB",
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-dos-gdghHmbV"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-M7P8-9W66-9FRM
Vulnerability from github – Published: 2018-01-06 01:11 – Updated: 2023-01-23 21:24The Net::LDAP (aka net-ldap) gem before 0.16.0 for Ruby has Missing SSL Certificate Validation.
{
"affected": [
{
"package": {
"ecosystem": "RubyGems",
"name": "net-ldap"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.16.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2017-17718"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": true,
"github_reviewed_at": "2020-06-16T21:45:19Z",
"nvd_published_at": null,
"severity": "MODERATE"
},
"details": "The Net::LDAP (aka net-ldap) gem before 0.16.0 for Ruby has Missing SSL Certificate Validation.",
"id": "GHSA-m7p8-9w66-9frm",
"modified": "2023-01-23T21:24:13Z",
"published": "2018-01-06T01:11:34Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-17718"
},
{
"type": "WEB",
"url": "https://github.com/ruby-ldap/ruby-net-ldap/issues/258"
},
{
"type": "WEB",
"url": "https://github.com/ruby-ldap/ruby-net-ldap/pull/279"
},
{
"type": "PACKAGE",
"url": "https://github.com/ruby-ldap/ruby-net-ldap"
},
{
"type": "WEB",
"url": "http://openwall.com/lists/oss-security/2017/12/17/10"
}
],
"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"
}
],
"summary": "net-ldap Improper Certificate Validation vulnerability"
}
GHSA-M835-W378-P8VP
Vulnerability from github – Published: 2022-05-24 19:18 – Updated: 2022-05-24 19:18CFEngine Enterprise 3.15.0 through 3.15.4 has Missing SSL Certificate Validation.
{
"affected": [],
"aliases": [
"CVE-2021-36756"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-10-27T15:15:00Z",
"severity": "MODERATE"
},
"details": "CFEngine Enterprise 3.15.0 through 3.15.4 has Missing SSL Certificate Validation.",
"id": "GHSA-m835-w378-p8vp",
"modified": "2022-05-24T19:18:57Z",
"published": "2022-05-24T19:18:57Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-36756"
},
{
"type": "WEB",
"url": "https://cfengine.com/blog/2021/cve-2021-38379-and-cve-2021-36756"
},
{
"type": "WEB",
"url": "https://cfengine.com/downloads/cfengine-enterprise"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-M8M3-3PMC-XJ5P
Vulnerability from github – Published: 2024-12-16 18:31 – Updated: 2024-12-16 18:31An improper certificate validation vulnerability was reported in LADM that could allow a network attacker with the ability to redirect an update request to a remote server and execute code with elevated privileges.
{
"affected": [],
"aliases": [
"CVE-2024-6001"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-12-16T17:15:14Z",
"severity": "HIGH"
},
"details": "An improper certificate validation vulnerability was reported in LADM that could allow a network attacker with the ability to redirect an update request to a remote server and execute code with elevated privileges.",
"id": "GHSA-m8m3-3pmc-xj5p",
"modified": "2024-12-16T18:31:09Z",
"published": "2024-12-16T18:31:09Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-6001"
},
{
"type": "WEB",
"url": "https://support.lenovo.co/us/en/product_security/LEN-174319"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-M8R2-QGR6-4GQM
Vulnerability from github – Published: 2026-06-25 21:31 – Updated: 2026-06-26 21:32Certificates with wildcard DNS SANs (e.g. *.example.com) bypassed CA name-constraint checks. A certificate with a wildcard DNS SAN that should be rejected by the issuing CA's permitted/excluded DNS name constraints could be accepted.
{
"affected": [],
"aliases": [
"CVE-2026-10592"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-25T20:17:09Z",
"severity": "MODERATE"
},
"details": "Certificates with wildcard DNS SANs (e.g. *.example.com) bypassed CA name-constraint checks. A certificate with a wildcard DNS SAN that should be rejected by the issuing CA\u0027s permitted/excluded DNS name constraints could be accepted.",
"id": "GHSA-m8r2-qgr6-4gqm",
"modified": "2026-06-26T21:32:11Z",
"published": "2026-06-25T21:31:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-10592"
},
{
"type": "WEB",
"url": "https://github.com/wolfSSL/wolfssl/pull/10549"
},
{
"type": "WEB",
"url": "https://www.wolfssl.com/docs/security-vulnerabilities"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-M8X2-4GC8-9V3R
Vulnerability from github – Published: 2022-05-14 02:56 – Updated: 2022-12-12 17:01A man in the middle vulnerability exists in Jenkins CollabNet Plugin 2.0.4 and earlier in CollabNetApp.java, CollabNetPlugin.java, CNFormFieldValidator.java that allows attackers to impersonate any service that Jenkins connects to. CollabNet Plugin 2.0.5 and newer no longer does that. It instead requires users to opt in to disabling SSL/TLS certificate validation by setting the system property hudson.plugins.collabnet.CollabNetPlugin.skipSslValidation to true. This feature applies to connections by this plugin only.
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 2.0.4"
},
"package": {
"ecosystem": "Maven",
"name": "org.jenkins-ci.plugins:collabnet"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.0.5"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2018-1000605"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": true,
"github_reviewed_at": "2022-12-12T17:01:53Z",
"nvd_published_at": "2018-06-26T17:29:00Z",
"severity": "MODERATE"
},
"details": "A man in the middle vulnerability exists in Jenkins CollabNet Plugin 2.0.4 and earlier in CollabNetApp.java, CollabNetPlugin.java, CNFormFieldValidator.java that allows attackers to impersonate any service that Jenkins connects to. CollabNet Plugin 2.0.5 and newer no longer does that. It instead requires users to opt in to disabling SSL/TLS certificate validation by setting the system property hudson.plugins.collabnet.CollabNetPlugin.skipSslValidation to true. This feature applies to connections by this plugin only.",
"id": "GHSA-m8x2-4gc8-9v3r",
"modified": "2022-12-12T17:01:53Z",
"published": "2022-05-14T02:56:39Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-1000605"
},
{
"type": "PACKAGE",
"url": "https://github.com/jenkinsci/collabnet-plugin"
},
{
"type": "WEB",
"url": "https://jenkins.io/security/advisory/2018-06-25/#SECURITY-941"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N",
"type": "CVSS_V3"
}
],
"summary": "Jenkins CollabNet Plugin man in the middle vulnerability"
}
Mitigation
Certificates should be carefully managed and checked to assure that data are encrypted with the intended owner's public key.
Mitigation
If certificate pinning is being used, ensure that all relevant properties of the certificate are fully validated before the certificate is pinned, including the hostname.
CAPEC-459: Creating a Rogue Certification Authority Certificate
An adversary exploits a weakness resulting from using a hashing algorithm with weak collision resistance to generate certificate signing requests (CSR) that contain collision blocks in their "to be signed" parts. The adversary submits one CSR to be signed by a trusted certificate authority then uses the signed blob to make a second certificate appear signed by said certificate authority. Due to the hash collision, both certificates, though different, hash to the same value and so the signed blob works just as well in the second certificate. The net effect is that the adversary's second X.509 certificate, which the Certification Authority has never seen, is now signed and validated by that Certification Authority.
CAPEC-475: Signature Spoofing by Improper Validation
An adversary exploits a cryptographic weakness in the signature verification algorithm implementation to generate a valid signature without knowing the key.