{"id":"GHSA-4v8w-gg5j-ph37","summary":"MantisBT vulnerable to authentication bypass for some passwords due to PHP type juggling","details":"Due to an incorrect use of loose (`==`) instead of strict (`===`) comparison in the [authentication code][1], PHP type juggling will cause interpretation of certain MD5 hashes as numbers, specifically those matching scientific notation.\n\n[1]: https://github.com/mantisbt/mantisbt/blob/0fb502dd613991e892ed2224ac5ea3e40ba632bc/core/authentication_api.php#L782\n\n### Impact\nOn MantisBT instances configured to use the *MD5* login method, user accounts having a password hash evaluating to zero (i.e. matching regex `^0+[Ee][0-9]+$`) are vulnerable, allowing an attacker knowing the victim's username to login without knowledge of their actual password, using any other password having a  hash evaluating to zero, for example `comito5` (0e579603064547166083907005281618). \n\nNo password bruteforcing for individual users is needed, thus $g_max_failed_login_count does not protect against the attack.\n\n### Patches\n* https://github.com/mantisbt/mantisbt/commit/966554a19cf1bdbcfbfb3004766979faa748f9a2\n\n### Workarounds\nCheck the database for vulnerable accounts, and change those users' passwords, e.g. for MySQL:\n```sql\nSELECT username, email FROM mantis_user_table WHERE password REGEXP '^0+[Ee][0-9]+$'\n```\n\n### References\n- https://mantisbt.org/bugs/view.php?id=35967\n\n### Credits\nThanks to Harry Sintonen / Reversec for discovering and reporting the issue.","aliases":["CVE-2025-47776"],"modified":"2026-03-06T00:32:33.168285Z","published":"2025-11-03T17:07:36Z","database_specific":{"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2025-11-03T17:07:36Z","nvd_published_at":"2025-11-04T21:15:37Z","cwe_ids":["CWE-305","CWE-697"]},"references":[{"type":"WEB","url":"https://github.com/mantisbt/mantisbt/security/advisories/GHSA-4v8w-gg5j-ph37"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-47776"},{"type":"WEB","url":"https://github.com/mantisbt/mantisbt/commit/966554a19cf1bdbcfbfb3004766979faa748f9a2"},{"type":"PACKAGE","url":"https://github.com/mantisbt/mantisbt"},{"type":"WEB","url":"https://github.com/mantisbt/mantisbt/blob/0fb502dd613991e892ed2224ac5ea3e40ba632bc/core/authentication_api.php#L782"},{"type":"WEB","url":"https://mantisbt.org/bugs/view.php?id=35967"}],"affected":[{"package":{"name":"mantisbt/mantisbt","ecosystem":"Packagist","purl":"pkg:composer/mantisbt/mantisbt"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.27.2"}]}],"versions":["2.10.0","2.10.1","2.11.0","2.11.1","2.12.0","2.12.1","2.12.2","2.13.0","2.13.1","2.13.2","2.14.0","2.15.0","2.15.1","2.16.0","2.16.1","2.17.0","2.17.1","2.17.2","2.18.0","2.18.1","2.19.0","2.19.1","2.20.0","2.20.1","2.21.0","2.21.1","2.21.2","2.21.3","2.22.0","2.22.1","2.22.2","2.23.0","2.23.1","2.24.0","2.24.1","2.24.2","2.24.3","2.24.4","2.24.5","2.25.0","2.25.1","2.25.2","2.25.3","2.25.4","2.25.5","2.25.6","2.25.7","2.25.8","2.26.0","2.26.1","2.26.2","2.26.3","2.26.4","2.27.0","2.27.1","2.3.0","2.3.1","2.3.2","2.3.3","2.4.0","2.4.1","2.4.2","2.5.0","2.5.1","2.5.2","2.6.0","2.7.0","2.7.1","2.8.0","2.8.1","2.9.0","2.9.1"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/11/GHSA-4v8w-gg5j-ph37/GHSA-4v8w-gg5j-ph37.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N"}]}