CVE-2025-23369: enterprise server Signature Bypass

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.

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CVSS v3.1 Score

8.8

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-347 CWE-347

Affected Products

Vendor	Product	Versions
github	enterprise_server	< 3.12.14
github	enterprise_server	3.13.0 — 3.13.10
github	enterprise_server	3.14.0 — 3.14.7
github	enterprise_server	3.15.0 — 3.15.2

References

Other References

https://docs.github.com/en/[email protected]/admin/release-notes#3.12.14 https://docs.github.com/en/[email protected]/admin/release-notes#3.13.10 https://docs.github.com/en/[email protected]/admin/release-notes#3.14.7 https://docs.github.com/en/[email protected]/admin/release-notes#3.15.2

Frequently Asked Questions

What is CVE-2025-23369? +

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. It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2025-23369? +

CVE-2025-23369 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-23369? +

CVE-2025-23369 affects products from github, specifically: enterprise_server. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-23369? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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