CVE-2026-40596
MantisBT is vulnerable to XSS and potential account takeover via user font family preference update
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
Mantis Bug Tracker (MantisBT) is an open source issue tracker. Versions 2.11.0 through 2.28.1 allow any authenticated user to inject arbitrary HTML by updating their account's font family. Upon exploitation, an XSS payload would be reflected on every MantisBT page. Leveraging another vulnerability (CSP bypass, see GHSA-9c3j-xm6v-j7j3), the attacker could achieve account takeover. This issue has been fixed in version 2.28.2.
| CWE | CWE-79 |
| Vendor | mantisbt |
| Product | mantisbt |
| Published | May 22, 2026 |
| Last Updated | May 22, 2026 |
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Affected Versions
mantisbt / mantisbt
>= 2.11.0, < 2.28.2
References
github.com: https://github.com/mantisbt/mantisbt/security/advisories/GHSA-j3v9-553h-x28j github.com: https://github.com/mantisbt/mantisbt/security/advisories/GHSA-9c3j-xm6v-j7j3 github.com: https://github.com/mantisbt/mantisbt/commit/9e8409cdd979eba86ef532756fc47c1d8112d22d mantisbt.org: https://mantisbt.org/bugs/view.php?id=37011 mantisbt.org: https://mantisbt.org/bugs/view.php?id=37016