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CVE-2025-47776

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Date: November 4, 2025

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.

Severity Score

Related Resources (7)

https://nvd.nist.gov/vuln/detail/CVE-2025-47776
https://github.com/mantisbt/mantisbt/commit/966554a19cf1bdbcfbfb3004766979faa748f9a2
https://github.com/mantisbt/mantisbt
https://mantisbt.org/bugs/view.php?id=35967
https://github.com/mantisbt/mantisbt/security/advisories/GHSA-4v8w-gg5j-ph37
https://github.com/mantisbt/mantisbt/blob/0fb502dd613991e892ed2224ac5ea3e40ba632bc/core/authentication_api.php#L782
https://www.mend.io/vulnerability-database/CVE-2025-47776

Severity Score

Weakness Type (CWE)

Authentication Bypass by Primary Weakness

CWE-305

Incorrect Comparison

CWE-697

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): NONE

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