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Description

Mantis Bug Tracker (MantisBT) is an open source issue tracker. Versions 2.28.1 and prior contain a Stored XSS vulnerability. When cloning an issue originating from a Project other than the current one, the clone form (bug_report_page.php) prepends the source Project name before the category selector without proper escaping, allowing an attacker able to to inject HTML if they can set the Project's name (which typically requires manager or administrator access level). This issue has been resolved in version 2.28.2.

PUBLISHED Reserved 2026-03-27 | Published 2026-05-19 | Updated 2026-05-20 | Assigner GitHub_M




HIGH: 8.6CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Problem types

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

< 2.28.2
affected

References

github.com/...ntisbt/security/advisories/GHSA-fvjf-68wh-rwp2

github.com/...ommit/df22697ae497ddd93f3d9132fdf4979db8d081cd

mantisbt.org/bugs/view.php?id=36986

cve.org (CVE-2026-34463)

nvd.nist.gov (CVE-2026-34463)

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