CVE-2026-40596

MantisBT is vulnerable to XSS and potential account takeover via user font family preference update

Published: May 22, 2026Updated: Jul 23, 2026 Sources: CVE List NVDCWE-79

N/ACVSS

NVD MITRE

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.

No summary for this CVE yet.

Weaknesses

CWE-79

Affected Products

mantisbt

oss-projectaka mantis bt

mantisbtOn-premWeb App

Enterprise Software / itsm-monitoring

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

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References

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

github.com

and 2 more references View all →

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