Vulnerability in Mantisbt
CVE-2025-47776
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.003 (22.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 22.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Mantisbt — versions < 2.27.2
Weakness classification (CWE)
References
- github.com/mantisbt/mantisbt/security/advisories/GHSA-4v8w-gg5j-ph37 (Mitigation, Issue Tracking, Vendor Advisory)
- github.com/mantisbt/mantisbt/commit/966554a19cf1bdbcfbfb3004766979faa748f9a2 (Patch)
Frequently asked questions
- What is CVE-2025-47776?
- CVE-2025-47776 is a critical-severity vulnerability in Mantisbt, classified under Authentication Bypass by Primary Weakness. CVSS score: 9.1/10. Published 2025-11-04.
- How severe is CVE-2025-47776?
- Critical severity. CVSS v3 base score is 9.1 out of 10.