🛡️ CVE-2026-40596
🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-79 NVD
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:L/VA:L/SC:H/SI:H/SA:L
CWE CWE-79
Public Exploit ✅ No
Source NVD
Published 2026-05-11
Updated 2026-06-09
Modified 2026-06-08
Fix URL N/A

Affected Packages

Software From version Fixed in
mantisbt/mantisbt 2.11.0 2.28.2
unknown

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