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HIGHCVE-2026-40596Published Modified CNA GitHub_M

CVE-2026-40596: MantisBT is vulnerable to XSS and potential account takeover via user font family preference update

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.

Metrics

CVSS v4.0
7.2
Severity
HIGH
Fixed in
—
Affected Products
1
Affected packages
  • mantisbt / mantisbt
    >= 2.11.0, < 2.28.2
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
References