Mantis Bug Tracker (MantisBT) is an open source issue tracker. Due to incorrect use of loose (==) instead of strict (===) comparison in the authentication code in versions 2.27.1 and below.PHP type juggling will cause certain MD5 hashes matching scientific notation to be interpreted as numbers. Instances using the MD5 login method allow an attacker who knows the victim's username and has access to an account with a password hash that evaluates to zero to log in without knowing the victim's actual password, by using any other password with a hash that also evaluates to zero This issue is fixed in version 2.27.2.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://github.com/mantisbt/mantisbt/commit/966554a19cf1bdbcfbfb3004766979faa748f9a2 Patch
- https://github.com/mantisbt/mantisbt/security/advisories/GHSA-4v8w-gg5j-ph37 Issue Tracking, Mitigation, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 8.8 · mantisbtNVD modified 2026-10-19 13:10
Affected (CPE criteria) 1
cpe:2.3:a:mantisbt:mantisbt:*:*:*:*:*:*:*:*
References 2
- https://github.com/mantisbt/mantisbt/commit/966554a19cf1bdbcfbfb3004766979faa748f9a2 Patch
- https://github.com/mantisbt/mantisbt/security/advisories/GHSA-4v8w-gg5j-ph37 Issue Tracking, Mitigation, Vendor Advisory