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-4PV6-Q257-8Q33
Vulnerability from github – Published: 2023-04-11 18:30 – Updated: 2024-04-04 03:24An improper certificate validation vulnerability [CWE-295] in FortiAnalyzer and FortiManager 7.2.0 through 7.2.1, 7.0.0 through 7.0.5, 6.4.8 through 6.4.10 may allow a remote and unauthenticated attacker to perform a Man-in-the-Middle attack on the communication channel between the device and the remote FortiGuard server hosting outbreakalert ressources.
{
"affected": [],
"aliases": [
"CVE-2023-22642"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-04-11T17:15:00Z",
"severity": "HIGH"
},
"details": "An improper certificate validation vulnerability [CWE-295] in FortiAnalyzer and FortiManager 7.2.0 through 7.2.1, 7.0.0 through 7.0.5, 6.4.8 through 6.4.10 may allow a remote and unauthenticated attacker to perform a Man-in-the-Middle attack on the communication channel between the device and the remote FortiGuard server hosting outbreakalert ressources.",
"id": "GHSA-4pv6-q257-8q33",
"modified": "2024-04-04T03:24:40Z",
"published": "2023-04-11T18:30:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-22642"
},
{
"type": "WEB",
"url": "https://fortiguard.com/psirt/FG-IR-22-502"
}
],
"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-4Q88-82VM-7283
Vulnerability from github – Published: 2026-07-06 12:31 – Updated: 2026-07-06 12:31Improper certificate validation vulnerability in B&R Industrial Automation GmbH APROL.
This issue affects APROL: before R 4.4-01P5.
{
"affected": [],
"aliases": [
"CVE-2026-6900"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-06T11:16:31Z",
"severity": "CRITICAL"
},
"details": "Improper certificate validation vulnerability in B\u0026R Industrial Automation GmbH APROL.\n\nThis issue affects APROL: before R 4.4-01P5.",
"id": "GHSA-4q88-82vm-7283",
"modified": "2026-07-06T12:31:31Z",
"published": "2026-07-06T12:31:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6900"
},
{
"type": "WEB",
"url": "https://br-cws-assets.de-fra-1.linodeobjects.com/SA26P011-661853b7.pdf"
}
],
"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:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/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-4QMX-9M2V-R9QW
Vulnerability from github – Published: 2022-05-24 19:15 – Updated: 2022-05-24 19:15IBM Security Verify Bridge 1.0.5.0 could allow a user to obtain sensitive information due to improper certificate validation. IBM X-Force ID: 208155.
{
"affected": [],
"aliases": [
"CVE-2021-38864"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-09-23T17:15:00Z",
"severity": "HIGH"
},
"details": "IBM Security Verify Bridge 1.0.5.0 could allow a user to obtain sensitive information due to improper certificate validation. IBM X-Force ID: 208155.",
"id": "GHSA-4qmx-9m2v-r9qw",
"modified": "2022-05-24T19:15:30Z",
"published": "2022-05-24T19:15:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-38864"
},
{
"type": "WEB",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/208155"
},
{
"type": "WEB",
"url": "https://www.ibm.com/support/pages/node/6491651"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-4QRJ-99R6-JFRH
Vulnerability from github – Published: 2022-05-24 17:28 – Updated: 2023-12-14 10:03Email Extension Plugin 2.75 and earlier does not perform hostname validation when connecting to the configured SMTP server. This lack of validation could be abused using a man-in-the-middle attack to intercept these connections.
Email Extension Plugin 2.76 validates the SMTP hostname when connecting via TLS by default. In Email Extension Plugin 2.75 and earlier, administrators can set the Java system property mail.smtp.ssl.checkserveridentity to true on startup to enable this protection. Alternatively, this protection can be enabled (or disabled in the new version) via the 'Advanced Email Properties' field in the plugin’s configuration in Configure System.
In case of problems, this protection can be disabled again by setting mail.smtp.ssl.checkserveridentity to false using either method.
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 2.75"
},
"package": {
"ecosystem": "Maven",
"name": "org.jenkins-ci.plugins:email-ext"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.76"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2020-2253"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": true,
"github_reviewed_at": "2022-12-29T01:29:38Z",
"nvd_published_at": "2020-09-16T14:15:00Z",
"severity": "MODERATE"
},
"details": "Email Extension Plugin 2.75 and earlier does not perform hostname validation when connecting to the configured SMTP server. This lack of validation could be abused using a man-in-the-middle attack to intercept these connections.\n\nEmail Extension Plugin 2.76 validates the SMTP hostname when connecting via TLS by default. In Email Extension Plugin 2.75 and earlier, administrators can set the Java system property `mail.smtp.ssl.checkserveridentity` to `true` on startup to enable this protection. Alternatively, this protection can be enabled (or disabled in the new version) via the \u0027Advanced Email Properties\u0027 field in the plugin\u2019s configuration in Configure System.\n\nIn case of problems, this protection can be disabled again by setting `mail.smtp.ssl.checkserveridentity` to `false` using either method.",
"id": "GHSA-4qrj-99r6-jfrh",
"modified": "2023-12-14T10:03:59Z",
"published": "2022-05-24T17:28:24Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-2253"
},
{
"type": "WEB",
"url": "https://github.com/jenkinsci/email-ext-plugin/commit/ac039ba581f5946975a327709ff201b459900caa"
},
{
"type": "PACKAGE",
"url": "https://github.com/jenkinsci/email-ext-plugin"
},
{
"type": "WEB",
"url": "https://www.jenkins.io/security/advisory/2020-09-16/#SECURITY-1851"
},
{
"type": "WEB",
"url": "http://www.openwall.com/lists/oss-security/2020/09/16/3"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
"type": "CVSS_V3"
}
],
"summary": "Missing hostname validation in Email Extension Plugin"
}
GHSA-4QW4-FMQV-QHV8
Vulnerability from github – Published: 2026-09-26 15:31 – Updated: 2026-09-26 15:31Netty versions from 4.2.11.Final before 4.2.18.Final contain an incomplete hostname verification fix in the QUIC certificate verification path when using a plain X509TrustManager. The BoringSSLCertificateVerifyCallback discards the SSLEngine for plain trust managers, preventing endpoint identification from running even when HTTPS verification is configured. Attackers on the network path can present a certificate chain for the wrong hostname that the plain trust manager accepts, bypassing hostname authentication for QUIC clients.
{
"affected": [],
"aliases": [
"CVE-2026-100665"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-26T14:16:49Z",
"severity": "HIGH"
},
"details": "Netty versions from 4.2.11.Final before 4.2.18.Final contain an incomplete hostname verification fix in the QUIC certificate verification path when using a plain X509TrustManager. The BoringSSLCertificateVerifyCallback discards the SSLEngine for plain trust managers, preventing endpoint identification from running even when HTTPS verification is configured. Attackers on the network path can present a certificate chain for the wrong hostname that the plain trust manager accepts, bypassing hostname authentication for QUIC clients.",
"id": "GHSA-4qw4-fmqv-qhv8",
"modified": "2026-09-26T15:31:19Z",
"published": "2026-09-26T15:31:19Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/netty/netty/security/advisories/GHSA-mj35-3qqm-q387"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-100665"
},
{
"type": "WEB",
"url": "https://github.com/netty/netty/commit/09e72c4fd8007277121ed48db63a124b112b96fe"
},
{
"type": "WEB",
"url": "https://github.com/netty/netty/commit/994e887ed9"
},
{
"type": "WEB",
"url": "https://www.vulncheck.com/advisories/netty-4.2.11-through-4.2.17-quic-hostname-verification-bypass"
}
],
"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"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/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-4R5V-2F2W-H6RR
Vulnerability from github – Published: 2022-05-02 03:58 – Updated: 2022-05-02 03:58Cerulean Studios Trillian 3.1 Basic does not check SSL certificates during MSN authentication, which allows remote attackers to obtain MSN credentials via a man-in-the-middle attack with a spoofed SSL certificate.
{
"affected": [],
"aliases": [
"CVE-2009-4831"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2010-04-29T19:30:00Z",
"severity": "MODERATE"
},
"details": "Cerulean Studios Trillian 3.1 Basic does not check SSL certificates during MSN authentication, which allows remote attackers to obtain MSN credentials via a man-in-the-middle attack with a spoofed SSL certificate.",
"id": "GHSA-4r5v-2f2w-h6rr",
"modified": "2022-05-02T03:58:42Z",
"published": "2022-05-02T03:58:42Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2009-4831"
},
{
"type": "WEB",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/51400"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/35620"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/archive/1/504573/100/0/threaded"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/35509"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-4V68-66G8-2GRG
Vulnerability from github – Published: 2022-05-25 00:00 – Updated: 2022-06-07 00:00An improper certificate validation vulnerability [CWE-295] in FortiOS 6.0.0 through 6.0.14, 6.2.0 through 6.2.10, 6.4.0 through 6.4.8, 7.0.0 may allow a network adjacent and unauthenticated attacker to man-in-the-middle the communication between the FortiGate and some peers such as private SDNs and external cloud platforms.
{
"affected": [],
"aliases": [
"CVE-2022-22306"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-05-24T15:15:00Z",
"severity": "MODERATE"
},
"details": "An improper certificate validation vulnerability [CWE-295] in FortiOS 6.0.0 through 6.0.14, 6.2.0 through 6.2.10, 6.4.0 through 6.4.8, 7.0.0 may allow a network adjacent and unauthenticated attacker to man-in-the-middle the communication between the FortiGate and some peers such as private SDNs and external cloud platforms.",
"id": "GHSA-4v68-66g8-2grg",
"modified": "2022-06-07T00:00:33Z",
"published": "2022-05-25T00:00:39Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-22306"
},
{
"type": "WEB",
"url": "https://fortiguard.com/psirt/FG-IR-21-239"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-4VG4-Q9RF-R94R
Vulnerability from github – Published: 2022-05-17 01:22 – Updated: 2022-05-17 01:22wpa_supplicant 2.0-16 does not properly check certificate subject name, which allows remote attackers to cause a man-in-the-middle attack.
{
"affected": [],
"aliases": [
"CVE-2015-0210"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-08-28T15:29:00Z",
"severity": "MODERATE"
},
"details": "wpa_supplicant 2.0-16 does not properly check certificate subject name, which allows remote attackers to cause a man-in-the-middle attack.",
"id": "GHSA-4vg4-q9rf-r94r",
"modified": "2022-05-17T01:22:09Z",
"published": "2022-05-17T01:22:09Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2015-0210"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1178263"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1178921"
}
],
"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-4VHM-33MH-2464
Vulnerability from github – Published: 2025-01-10 18:31 – Updated: 2025-01-13 21:30An issue in CP Plus CP-VNR-3104 B3223P22C02424 allows attackers to access the Diffie-Hellman (DH) parameters and access sensitive data or execute a man-in-the-middle attack.
{
"affected": [],
"aliases": [
"CVE-2024-54847"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-01-10T17:15:17Z",
"severity": "MODERATE"
},
"details": "An issue in CP Plus CP-VNR-3104 B3223P22C02424 allows attackers to access the Diffie-Hellman (DH) parameters and access sensitive data or execute a man-in-the-middle attack.",
"id": "GHSA-4vhm-33mh-2464",
"modified": "2025-01-13T21:30:52Z",
"published": "2025-01-10T18:31:41Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-3817"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-54847"
},
{
"type": "WEB",
"url": "https://github.com/Yashodhanvivek/CP-VNR-3104-NVR-Vulnerabilties/blob/main/CPPlus_CP-VNR-3104_Security_Assessment.pdf"
},
{
"type": "WEB",
"url": "https://payatu.com/blog/solving-the-problem-of-encrypted-firmware"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-4W83-58W6-759F
Vulnerability from github – Published: 2022-07-07 00:00 – Updated: 2022-07-15 00:00Multiple vulnerabilities in the API and in the web-based management interface of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow a remote attacker to overwrite arbitrary files or conduct null byte poisoning attacks on an affected device. Note: Cisco Expressway Series refers to the Expressway Control (Expressway-C) device and the Expressway Edge (Expressway-E) device. For more information about these vulnerabilities, see the Details section of this advisory.
{
"affected": [],
"aliases": [
"CVE-2022-20813"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-07-06T21:15:00Z",
"severity": "MODERATE"
},
"details": "Multiple vulnerabilities in the API and in the web-based management interface of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow a remote attacker to overwrite arbitrary files or conduct null byte poisoning attacks on an affected device. Note: Cisco Expressway Series refers to the Expressway Control (Expressway-C) device and the Expressway Edge (Expressway-E) device. For more information about these vulnerabilities, see the Details section of this advisory.",
"id": "GHSA-4w83-58w6-759f",
"modified": "2022-07-15T00:00:17Z",
"published": "2022-07-07T00:00:23Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-20813"
},
{
"type": "WEB",
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-expressway-overwrite-3buqW8LH"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
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.