GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration
Common Weakness Enumeration

CWE-295

Allowed

Improper Certificate Validation

Abstraction: Base · Status: Draft

The product does not validate, or incorrectly validates, a certificate.

2142 vulnerabilities reference this CWE, most recent first.

GHSA-WXV5-Q299-W25J

Vulnerability from github – Published: 2025-10-15 15:30 – Updated: 2025-10-15 15:30
VLAI
Details

A vulnerability was reported in the Lenovo LeCloud client application that, under certain conditions, could allow information disclosure.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2025-10699"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-295"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-10-15T15:16:03Z",
    "severity": "MODERATE"
  },
  "details": "A vulnerability was reported in the Lenovo LeCloud client application that, under certain conditions, could allow information disclosure.",
  "id": "GHSA-wxv5-q299-w25j",
  "modified": "2025-10-15T15:30:29Z",
  "published": "2025-10-15T15:30:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-10699"
    },
    {
      "type": "WEB",
      "url": "https://iknow.lenovo.com.cn/detail/432379"
    },
    {
      "type": "WEB",
      "url": "https://lecloud.lenovo.com/index"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/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-WXVR-H7G5-RFC7

Vulnerability from github – Published: 2022-05-14 03:15 – Updated: 2025-04-12 13:04
VLAI
Details

The TLS protocol 1.2 and earlier supports the rsa_fixed_dh, dss_fixed_dh, rsa_fixed_ecdh, and ecdsa_fixed_ecdh values for ClientCertificateType but does not directly document the ability to compute the master secret in certain situations with a client secret key and server public key but not a server secret key, which makes it easier for man-in-the-middle attackers to spoof TLS servers by leveraging knowledge of the secret key for an arbitrary installed client X.509 certificate, aka the "Key Compromise Impersonation (KCI)" issue.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2015-8960"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-295"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2016-09-21T02:59:00Z",
    "severity": "HIGH"
  },
  "details": "The TLS protocol 1.2 and earlier supports the rsa_fixed_dh, dss_fixed_dh, rsa_fixed_ecdh, and ecdsa_fixed_ecdh values for ClientCertificateType but does not directly document the ability to compute the master secret in certain situations with a client secret key and server public key but not a server secret key, which makes it easier for man-in-the-middle attackers to spoof TLS servers by leveraging knowledge of the secret key for an arbitrary installed client X.509 certificate, aka the \"Key Compromise Impersonation (KCI)\" issue.",
  "id": "GHSA-wxvr-h7g5-rfc7",
  "modified": "2025-04-12T13:04:24Z",
  "published": "2022-05-14T03:15:57Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2015-8960"
    },
    {
      "type": "WEB",
      "url": "https://kcitls.org"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20180626-0002"
    },
    {
      "type": "WEB",
      "url": "https://www.usenix.org/system/files/conference/woot15/woot15-paper-hlauschek.pdf"
    },
    {
      "type": "WEB",
      "url": "http://twitter.com/matthew_d_green/statuses/630908726950674433"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2016/09/20/4"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/93071"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-X2MC-PW6Q-5PV7

Vulnerability from github – Published: 2022-05-24 19:03 – Updated: 2022-05-24 19:03
VLAI
Details

libgrss through 0.7.0 fails to perform TLS certificate verification when downloading feeds, allowing remote attackers to manipulate the contents of feeds without detection. This occurs because of the default behavior of SoupSessionSync.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2016-20011"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-295"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-05-25T21:15:00Z",
    "severity": "HIGH"
  },
  "details": "libgrss through 0.7.0 fails to perform TLS certificate verification when downloading feeds, allowing remote attackers to manipulate the contents of feeds without detection. This occurs because of the default behavior of SoupSessionSync.",
  "id": "GHSA-x2mc-pw6q-5pv7",
  "modified": "2022-05-24T19:03:09Z",
  "published": "2022-05-24T19:03:09Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2016-20011"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.gnome.org/show_bug.cgi?id=772647"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.gnome.org/GNOME/libgrss/-/issues/4"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.gnome.org/GNOME/libgrss/-/merge_requests/7.patch"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GHSA-X2R9-67W9-58FR

Vulnerability from github – Published: 2022-05-02 06:22 – Updated: 2024-02-14 18:30
VLAI
Details

OpenSSL in Apple Mac OS X 10.6.x before 10.6.5 does not properly perform arithmetic, which allows remote attackers to bypass X.509 certificate authentication via an arbitrary certificate issued by a legitimate Certification Authority.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2010-1378"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-295"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2010-11-15T23:00:00Z",
    "severity": "HIGH"
  },
  "details": "OpenSSL in Apple Mac OS X 10.6.x before 10.6.5 does not properly perform arithmetic, which allows remote attackers to bypass X.509 certificate authentication via an arbitrary certificate issued by a legitimate Certification Authority.",
  "id": "GHSA-x2r9-67w9-58fr",
  "modified": "2024-02-14T18:30:24Z",
  "published": "2022-05-02T06:22:02Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2010-1378"
    },
    {
      "type": "WEB",
      "url": "http://lists.apple.com/archives/security-announce/2010//Nov/msg00000.html"
    },
    {
      "type": "WEB",
      "url": "http://support.apple.com/kb/HT4435"
    }
  ],
  "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-X38V-8Q6P-W65C

Vulnerability from github – Published: 2022-06-03 00:01 – Updated: 2024-03-27 15:30
VLAI
Details

libcurl would reuse a previously created connection even when a TLS or SSHrelated option had been changed that should have prohibited reuse.libcurl keeps previously used connections in a connection pool for subsequenttransfers to reuse if one of them matches the setup. However, several TLS andSSH settings were left out from the configuration match checks, making themmatch too easily.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2022-27782"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-295"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-06-02T14:15:00Z",
    "severity": "HIGH"
  },
  "details": "libcurl would reuse a previously created connection even when a TLS or SSHrelated option had been changed that should have prohibited reuse.libcurl keeps previously used connections in a connection pool for subsequenttransfers to reuse if one of them matches the setup. However, several TLS andSSH settings were left out from the configuration match checks, making themmatch too easily.",
  "id": "GHSA-x38v-8q6p-w65c",
  "modified": "2024-03-27T15:30:35Z",
  "published": "2022-06-03T00:01:04Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-27782"
    },
    {
      "type": "WEB",
      "url": "https://hackerone.com/reports/1555796"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2022/08/msg00017.html"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202212-01"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20220609-0009"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2022/dsa-5197"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2023/03/20/6"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-X3MP-WRFX-JWGF

Vulnerability from github – Published: 2022-05-14 01:54 – Updated: 2022-05-14 01:54
VLAI
Details

The Subsonic Music Streamer application 4.4 for Android has Improper Certificate Validation of the Subsonic server certificate, which might allow man-in-the-middle attackers to obtain interaction data.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2018-15898"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-295"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2018-09-11T21:29:00Z",
    "severity": "MODERATE"
  },
  "details": "The Subsonic Music Streamer application 4.4 for Android has Improper Certificate Validation of the Subsonic server certificate, which might allow man-in-the-middle attackers to obtain interaction data.",
  "id": "GHSA-x3mp-wrfx-jwgf",
  "modified": "2022-05-14T01:54:34Z",
  "published": "2022-05-14T01:54:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-15898"
    },
    {
      "type": "WEB",
      "url": "http://packetstormsecurity.com/files/149267/Subsonic-Music-Streamer-4.4-For-Android-Improper-Certificate-Validation.html"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/fulldisclosure/2018/Sep/6"
    }
  ],
  "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-X3VM-975Q-MG2X

Vulnerability from github – Published: 2022-05-17 01:38 – Updated: 2024-02-14 18:30
VLAI
Details

The contribution feature in Zamboni does not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate, related to use of the Python urllib2 library.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2012-5822"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20",
      "CWE-295"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2012-11-04T22:55:00Z",
    "severity": "MODERATE"
  },
  "details": "The contribution feature in Zamboni does not verify that the server hostname matches a domain name in the subject\u0027s Common Name (CN) or subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate, related to use of the Python urllib2 library.",
  "id": "GHSA-x3vm-975q-mg2x",
  "modified": "2024-02-14T18:30:24Z",
  "published": "2022-05-17T01:38:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2012-5822"
    },
    {
      "type": "WEB",
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/79929"
    },
    {
      "type": "WEB",
      "url": "http://www.cs.utexas.edu/~shmat/shmat_ccs12.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"
    }
  ]
}

GHSA-X3VR-472G-GMXM

Vulnerability from github – Published: 2024-02-07 18:30 – Updated: 2025-11-04 00:30
VLAI
Details

IBM Security Verify Access 10.0.0.0 through 10.0.6.1 could allow a privileged user to install a configuration file that could allow remote access. IBM X-Force ID: 266155.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2023-43017"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-295"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-02-07T17:15:09Z",
    "severity": "HIGH"
  },
  "details": "IBM Security Verify Access 10.0.0.0 through 10.0.6.1 could allow a privileged user to install a configuration file that could allow remote access.  IBM X-Force ID:  266155.",
  "id": "GHSA-x3vr-472g-gmxm",
  "modified": "2025-11-04T00:30:46Z",
  "published": "2024-02-07T18:30:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-43017"
    },
    {
      "type": "WEB",
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/266155"
    },
    {
      "type": "WEB",
      "url": "https://www.ibm.com/support/pages/node/7106586"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/fulldisclosure/2024/Nov/0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-X3XW-JP2M-77MV

Vulnerability from github – Published: 2024-09-10 15:31 – Updated: 2024-09-10 15:31
VLAI
Details

AAn improper certificate validation vulnerability [CWE-295] in FortiClientWindows 7.2.0 through 7.2.2, 7.0.0 through 7.0.11, FortiClientLinux 7.2.0, 7.0.0 through 7.0.11 and FortiClientMac 7.0.0 through 7.0.11, 7.2.0 through 7.2.4 may allow a remote and unauthenticated attacker to perform a Man-in-the-Middle attack on the communication channel between the FortiGate and the FortiClient during the ZTNA tunnel creation

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2024-31489"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-295"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-09-10T15:15:15Z",
    "severity": "MODERATE"
  },
  "details": "AAn improper certificate validation vulnerability [CWE-295] in FortiClientWindows 7.2.0 through 7.2.2, 7.0.0 through 7.0.11,  FortiClientLinux 7.2.0, 7.0.0 through 7.0.11 and FortiClientMac 7.0.0 through 7.0.11, 7.2.0 through 7.2.4 may allow a remote and unauthenticated attacker to perform a Man-in-the-Middle attack on the communication channel between the FortiGate and the FortiClient during the ZTNA tunnel creation",
  "id": "GHSA-x3xw-jp2m-77mv",
  "modified": "2024-09-10T15:31:05Z",
  "published": "2024-09-10T15:31:05Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-31489"
    },
    {
      "type": "WEB",
      "url": "https://fortiguard.fortinet.com/psirt/FG-IR-22-282"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-X45J-4G47-7HXX

Vulnerability from github – Published: 2022-05-13 01:12 – Updated: 2022-05-13 01:12
VLAI
Details

Previously, Puppet Discovery was shipped with a default generated TLS certificate in the nginx container. In version 1.4.0, a unique certificate will be generated on installation or the user will be able to provide their own TLS certificate for ingress.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2018-11747"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-295"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-03-21T16:00:00Z",
    "severity": "CRITICAL"
  },
  "details": "Previously, Puppet Discovery was shipped with a default generated TLS certificate in the nginx container. In version 1.4.0, a unique certificate will be generated on installation or the user will be able to provide their own TLS certificate for ingress.",
  "id": "GHSA-x45j-4g47-7hxx",
  "modified": "2022-05-13T01:12:18Z",
  "published": "2022-05-13T01:12:18Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-11747"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/rd0e44e8ef71eeaaa3cf3d1b8b41eb25894372e2995ec908ce7624d26@%3Ccommits.pulsar.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://puppet.com/security/cve/CVE-2018-11747"
    }
  ],
  "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"
    }
  ]
}

Mitigation
Architecture and Design Implementation

Certificates should be carefully managed and checked to assure that data are encrypted with the intended owner's public key.

Mitigation
Implementation

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.