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CVE-2025-23369— Improper Verification of Cryptographic Signature in GitHub Enterprise Server Allows Signature Spoofing by Improper Validation

Quick assessment

Affected
GitHub Enterprise Server
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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。

AI Predicted 7.5 Difficulty: Moderate EPSS 1.62% · P75

Possible ATT&CK Techniques 1 AI

T1566.001 · Spearphishing Attachment
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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: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5
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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III. Intelligence Information for CVE-2025-23369

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Vendor Pages for CVE-2025-23369 (4)

IV. Related Vulnerabilities

Same product: Enterprise Server
Same vendor: GitHub
Same weakness: CWE-347

V. Comments for CVE-2025-23369

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