CWE-295
AllowedImproper Certificate Validation
Abstraction: Base · Status: Draft
The product does not validate, or incorrectly validates, a certificate.
1914 vulnerabilities reference this CWE, most recent first.
GHSA-F2GP-JQV6-CMXG
Vulnerability from github – Published: 2022-08-24 00:00 – Updated: 2022-08-29 20:06A flaw was found in openCryptoki. The openCryptoki Soft token does not check if an EC key is valid when an EC key is created via C_CreateObject, nor when C_DeriveKey is used with ECDH public data. This may allow a malicious user to extract the private key by performing an invalid curve attack.
{
"affected": [],
"aliases": [
"CVE-2021-3798"
],
"database_specific": {
"cwe_ids": [
"CWE-200",
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-08-23T16:15:00Z",
"severity": "MODERATE"
},
"details": "A flaw was found in openCryptoki. The openCryptoki Soft token does not check if an EC key is valid when an EC key is created via C_CreateObject, nor when C_DeriveKey is used with ECDH public data. This may allow a malicious user to extract the private key by performing an invalid curve attack.",
"id": "GHSA-f2gp-jqv6-cmxg",
"modified": "2022-08-29T20:06:47Z",
"published": "2022-08-24T00:00:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-3798"
},
{
"type": "WEB",
"url": "https://github.com/opencryptoki/opencryptoki/pull/402"
},
{
"type": "WEB",
"url": "https://github.com/opencryptoki/opencryptoki/commit/4e3b43c3d8844402c04a66b55c6c940f965109f0"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHBA-2021:3054"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2021-3798"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1990591"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-F38F-HQFR-4QJ5
Vulnerability from github – Published: 2022-05-24 19:15 – Updated: 2022-05-24 19:15The Zoom Client for Meetings for Windows in all versions before 5.3.0 fails to properly validate the certificate information used to sign .msi files when performing an update of the client. This could lead to remote code execution in an elevated privileged context.
{
"affected": [],
"aliases": [
"CVE-2021-33907"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-09-27T14:15:00Z",
"severity": "CRITICAL"
},
"details": "The Zoom Client for Meetings for Windows in all versions before 5.3.0 fails to properly validate the certificate information used to sign .msi files when performing an update of the client. This could lead to remote code execution in an elevated privileged context.",
"id": "GHSA-f38f-hqfr-4qj5",
"modified": "2022-05-24T19:15:51Z",
"published": "2022-05-24T19:15:51Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-33907"
},
{
"type": "WEB",
"url": "https://cwe.mitre.org/data/definitions/347.html"
},
{
"type": "WEB",
"url": "https://explore.zoom.us/en/trust/security/security-bulletin"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-F3GG-32XV-8J76
Vulnerability from github – Published: 2026-07-15 03:32 – Updated: 2026-07-15 03:32An Improper Validation of Integrity Check Value and Improper Certificate Validation in certain ASUS router models allows a remote man-in-the-middle(MITM) user to make the router download and execute arbitrary command via a spoofed server. Refer to the ' Security Update for ASUS Router Firmware ' section on the ASUS Security Advisory for more information.
{
"affected": [],
"aliases": [
"CVE-2026-13385"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-15T02:18:12Z",
"severity": "CRITICAL"
},
"details": "An Improper Validation of Integrity Check Value and Improper Certificate Validation in certain ASUS router models allows a remote man-in-the-middle(MITM) user to make the router download and execute arbitrary command via a spoofed server.\nRefer to the \u0027\u00a0\nSecurity Update for ASUS Router Firmware\u00a0\u00a0\u0027 section on the ASUS Security Advisory for more information.",
"id": "GHSA-f3gg-32xv-8j76",
"modified": "2026-07-15T03:32:51Z",
"published": "2026-07-15T03:32:51Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-13385"
},
{
"type": "WEB",
"url": "https://www.asus.com/security-advisory"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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-F56R-HFV8-Q98C
Vulnerability from github – Published: 2023-07-17 18:31 – Updated: 2024-04-04 06:11Mattermost iOS app fails to properly validate the server certificate while initializing the TLS connection allowing a network attacker to intercept the WebSockets connection.
{
"affected": [],
"aliases": [
"CVE-2023-3615"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-07-17T16:15:11Z",
"severity": "HIGH"
},
"details": "Mattermost iOS app fails\u00a0to properly\u00a0validate the server certificate while initializing the TLS connection allowing a network attacker to intercept the WebSockets connection.\n\n",
"id": "GHSA-f56r-hfv8-q98c",
"modified": "2024-04-04T06:11:12Z",
"published": "2023-07-17T18:31:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-3615"
},
{
"type": "WEB",
"url": "https://mattermost.com/security-updates"
}
],
"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-F58W-649R-QJR9
Vulnerability from github – Published: 2019-03-25 16:18 – Updated: 2024-10-27 15:34Splunk-SDK-Python before 1.6.6 does not properly verify untrusted TLS server certificates, which could result in man-in-the-middle attacks.
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "splunk-sdk"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.6.6"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2019-5729"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": true,
"github_reviewed_at": "2020-06-16T21:33:41Z",
"nvd_published_at": null,
"severity": "CRITICAL"
},
"details": "Splunk-SDK-Python before 1.6.6 does not properly verify untrusted TLS server certificates, which could result in man-in-the-middle attacks.",
"id": "GHSA-f58w-649r-qjr9",
"modified": "2024-10-27T15:34:51Z",
"published": "2019-03-25T16:18:04Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-5729"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-f58w-649r-qjr9"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/splunk-sdk/PYSEC-2019-203.yaml"
},
{
"type": "PACKAGE",
"url": "https://github.com/splunk/splunk-sdk-python"
},
{
"type": "WEB",
"url": "https://www.splunk.com/view/SP-CAAAQAD"
}
],
"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"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "splunk-sdk does not properly verify untrusted TLS server certificates"
}
GHSA-F5H9-5Q52-QRX7
Vulnerability from github – Published: 2026-04-09 21:31 – Updated: 2026-04-16 21:31Missing hash/digest size and OID checks allow digests smaller than allowed when verifying ECDSA certificates, or smaller than is appropriate for the relevant key type, to be accepted by signature verification functions. This could lead to reduced security of ECDSA certificate-based authentication if the public CA key used is also known. This affects ECDSA/ECC verification when EdDSA or ML-DSA is also enabled.
{
"affected": [],
"aliases": [
"CVE-2026-5194"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-04-09T20:16:28Z",
"severity": "CRITICAL"
},
"details": "Missing hash/digest size and OID checks allow digests smaller than allowed when verifying ECDSA certificates, or smaller than is appropriate for the relevant key type, to be accepted by signature verification functions. This could lead to reduced security of ECDSA certificate-based authentication if the public CA key used is also known. This affects ECDSA/ECC verification when EdDSA or ML-DSA is also enabled.",
"id": "GHSA-f5h9-5q52-qrx7",
"modified": "2026-04-16T21:31:11Z",
"published": "2026-04-09T21:31:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-5194"
},
{
"type": "WEB",
"url": "https://github.com/wolfSSL/wolfssl/pull/10131"
}
],
"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:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:H/SI:L/SA:L/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:Red",
"type": "CVSS_V4"
}
]
}
GHSA-F5Q5-79FF-JH27
Vulnerability from github – Published: 2023-10-13 18:30 – Updated: 2024-04-04 08:38A potential security vulnerability has been identified in the HP ThinUpdate utility (also known as HP Recovery Image and Software Download Tool) which may lead to information disclosure. HP is releasing mitigation for the potential vulnerability.
{
"affected": [],
"aliases": [
"CVE-2023-4499"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-10-13T17:15:09Z",
"severity": "HIGH"
},
"details": "A potential security vulnerability has been identified in the HP ThinUpdate utility (also known as HP Recovery Image and Software Download Tool) which may lead to information disclosure. HP is releasing mitigation for the potential vulnerability.",
"id": "GHSA-f5q5-79ff-jh27",
"modified": "2024-04-04T08:38:17Z",
"published": "2023-10-13T18:30:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-4499"
},
{
"type": "WEB",
"url": "https://support.hp.com/us-en/document/ish_9440593-9440618-16"
}
],
"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-F6RC-73VX-29H5
Vulnerability from github – Published: 2024-07-31 21:32 – Updated: 2024-08-15 15:30An issue was discovered in filestash v0.4. The usage of the ssh.InsecureIgnoreHostKey() disables host key verification, possibly allowing attackers to obtain sensitive information via a man-in-the-middle attack.
{
"affected": [],
"aliases": [
"CVE-2024-41258"
],
"database_specific": {
"cwe_ids": [
"CWE-295",
"CWE-347"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-07-31T21:15:18Z",
"severity": "MODERATE"
},
"details": "An issue was discovered in filestash v0.4. The usage of the ssh.InsecureIgnoreHostKey() disables host key verification, possibly allowing attackers to obtain sensitive information via a man-in-the-middle attack.",
"id": "GHSA-f6rc-73vx-29h5",
"modified": "2024-08-15T15:30:53Z",
"published": "2024-07-31T21:32:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-41258"
},
{
"type": "WEB",
"url": "https://gist.github.com/nyxfqq/ed8c2ba3398c9e28cd8dbf0902bd8edf"
}
],
"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"
}
]
}
GHSA-F727-J88G-P3M8
Vulnerability from github – Published: 2022-05-13 01:38 – Updated: 2022-05-13 01:38A flaw was found in all Openshift Enterprise versions using the openshift elasticsearch plugin. An attacker with knowledge of the given name used to authenticate and access Elasticsearch can later access it without the token, bypassing authentication. This attack also requires that the Elasticsearch be configured with an external route, and the data accessed is limited to the indices.
{
"affected": [],
"aliases": [
"CVE-2017-12195"
],
"database_specific": {
"cwe_ids": [
"CWE-287",
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-07-27T15:29:00Z",
"severity": "MODERATE"
},
"details": "A flaw was found in all Openshift Enterprise versions using the openshift elasticsearch plugin. An attacker with knowledge of the given name used to authenticate and access Elasticsearch can later access it without the token, bypassing authentication. This attack also requires that the Elasticsearch be configured with an external route, and the data accessed is limited to the indices.",
"id": "GHSA-f727-j88g-p3m8",
"modified": "2022-05-13T01:38:11Z",
"published": "2022-05-13T01:38:11Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-12195"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2017:3188"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2017:3389"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2017-12195"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1501986"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-12195"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-F728-V2H3-3VFV
Vulnerability from github – Published: 2025-08-14 06:30 – Updated: 2025-08-14 06:30An insufficient validation on the server connection endpoint in Netskope Client allows local users to elevate privileges on the system. The insufficient validation allows Netskope Client to connect to any other server with Public Signed CA TLS certificates and send specially crafted responses to elevate privileges.
{
"affected": [],
"aliases": [
"CVE-2025-0309"
],
"database_specific": {
"cwe_ids": [
"CWE-295"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-08-14T05:15:26Z",
"severity": "MODERATE"
},
"details": "An insufficient validation on the server connection endpoint in Netskope Client allows local users to elevate privileges on the system. The insufficient validation allows Netskope Client to connect to any other server with Public Signed CA TLS certificates and send specially crafted responses to elevate privileges.",
"id": "GHSA-f728-v2h3-3vfv",
"modified": "2025-08-14T06:30:33Z",
"published": "2025-08-14T06:30:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-0309"
},
{
"type": "WEB",
"url": "https://blog.amberwolf.com/blog/2025/august/breaking-into-your-network-zer0-effort"
},
{
"type": "WEB",
"url": "https://www.netskope.com/company/security-compliance-and-assurance/security-advisories-and-disclosures/netskope-security-advisory-nskpsa-2025-002"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:P/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:H/SC:H/SI:H/SA:H/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"
}
]
}
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.