CVE-2025-23369
HIGHGitHub Enterprise Server < 3.12.14 - Improper Verification of Cryptographic Signature
Title source: llmExploitation Summary
EIP tracks 2 public exploits for CVE-2025-23369. PoCs published by hakivvi, Arian91.
AI-analyzed exploit summary This exploit manipulates a SAML response by removing and reinserting signatures, duplicating assertion nodes, and using XML entity references to bypass signature validation. It targets a vulnerability in libxml2's handling of SAML assertions.
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.
Exploits (2)
This exploit manipulates a SAML response by removing and reinserting signatures, duplicating assertion nodes, and using XML entity references to bypass signature validation. It targets a vulnerability in libxml2's handling of SAML assertions.
This PoC exploits CVE-2025-23369, a SAML authentication bypass vulnerability. It manipulates SAML responses by removing signatures, modifying IDs, and injecting XML entities to bypass authentication checks.
References (4)
Scores
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H