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.
Published: 2026-05-22
Score: 7.2 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-j3v9-553h-x28j MantisBT is Vulnerable to XSS leading to account takeover via updating a user's font family preference
History

Fri, 22 May 2026 22:30:00 +0000

Type Values Removed Values Added
First Time appeared Mantisbt
Mantisbt mantisbt
Vendors & Products Mantisbt
Mantisbt mantisbt

Fri, 22 May 2026 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 22 May 2026 20:00:00 +0000

Type Values Removed Values Added
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.
Title MantisBT is vulnerable to XSS and potential account takeover via user font family preference update
Weaknesses CWE-79
References
Metrics cvssV4_0

{'score': 7.2, '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'}


Subscriptions

Mantisbt Mantisbt
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-22T20:10:16.176Z

Reserved: 2026-04-14T14:07:59.641Z

Link: CVE-2026-40596

cve-icon Vulnrichment

Updated: 2026-05-22T20:10:12.843Z

cve-icon NVD

Status : Deferred

Published: 2026-05-22T20:16:34.180

Modified: 2026-06-17T10:45:30.500

Link: CVE-2026-40596

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-22T22:15:27Z

Weaknesses