CVE-2025-23369— Improper Verification of Cryptographic Signature in GitHub Enterprise Server Allows Signature Spoofing by Improper Validation
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I. Basic Information for CVE-2025-23369
Vulnerability Information
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Vulnerability Title
Improper Verification of Cryptographic Signature in GitHub Enterprise Server Allows Signature Spoofing by Improper Validation
Source: NVD (National Vulnerability Database)
Vulnerability Description
An improper verification of cryptographic signature vulnerability was identified in GitHub Enterprise Server that allowed signature spoofing for unauthorized internal users. Instances not utilizing SAML single sign-on or where the attacker is not already an existing user were not impacted. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.12.14, 3.13.10, 3.14.7, 3.15.2, and 3.16.0. This vulnerability was reported via the GitHub Bug Bounty program.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
密码学签名的验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
GitHub Enterprise Server 数据伪造问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GitHub Enterprise Server是美国GitHub开源的一个应用软件。提供一个将自己的GitHub实例设置为虚拟设备，从而提供可扩展，易于管理的平台。 GitHub Enterprise Server存在安全漏洞，该漏洞源于加密签名验证不当,允许未经授权的内部用户进行签名欺骗。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| GitHub | Enterprise Server | 3.12.0 ~ 3.12.13 | - |
II. Public POCs for CVE-2025-23369
| # | POC Description | Source Link | Shenlong Link |
|---|---|---|---|
| 1 | GitHub Entreprise Server SAML authentication bypass (CVE-2025-23369) exploit | https://github.com/hakivvi/CVE-2025-23369 | POC Details |
| 2 | bypass SAML authentication on GitHub Enterprise | https://github.com/Arian91/CVE-2025-23369_SAML_bypass | POC Details |
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IV. Related Vulnerabilities
Same product: Enterprise Server
- CVE-2026-8106
Reflected HTML injection vulnerability in GitHub Enterprise - CVE-2026-8034
Server-side request forgery vulnerability in GitHub Enterpri - CVE-2026-7541
Denial of service vulnerability in GitHub Enterprise Server - CVE-2026-6736
Authentication bypass vulnerability in GitHub Enterprise Ser - CVE-2026-5845
Improper authorization fallback allows scoped user-to-server
Same vendor: GitHub
- CVE-2026-8106
Reflected HTML injection vulnerability in GitHub Enterprise - CVE-2026-8034
Server-side request forgery vulnerability in GitHub Enterpri - CVE-2026-7541
Denial of service vulnerability in GitHub Enterprise Server - CVE-2026-6736
Authentication bypass vulnerability in GitHub Enterprise Ser - CVE-2026-5845
Improper authorization fallback allows scoped user-to-server
Same weakness: CWE-347
- CVE-2026-42193
Plunk: SNS webhook forgery - CVE-2026-44497
ZEBRA: Consensus Divergence in Transparent Sighash Hash-Type - CVE-2026-41669
Admidio: SAML Signature Validation Result Ignored — Forged A - CVE-2026-7689
Dolibarr ERP CRM Online Signature security.lib.php dol_verif - CVE-2026-33467
Improper Verification of Cryptographic Signature in Elastic
V. Comments for CVE-2025-23369
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