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Description

Mantis Bug Tracker (MantisBT) is an open source issue tracker. In versions 2.11.0 through 2.28.1, a Stored XSS vulnerability is caused by incorrect escaping of a saved filter's owner, allowing an attacker to inject arbitrary HTML on systems where $g_show_user_realname = ON. Note that By default, only users with Manager access level or above can save their filters publicly. This issue has been fixed in version 2.28.2. If developers are unable to update immediately, they can work around this issue by preventing display of users' real names (set $g_ show_user_realname = OFF; in configuration), and restricting the ability to store filters (set $g_stored_query_create_threshold / $g_stored_query_create_shared_threshold to NOBODY).

PUBLISHED Reserved 2026-04-14 | Published 2026-05-22 | Updated 2026-05-26 | Assigner GitHub_M




HIGH: 7.5CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

Problem types

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

Product status

>= 2.1.0, < 2.28.2
affected

References

github.com/...ntisbt/security/advisories/GHSA-f633-865q-2mhh

github.com/...ommit/44f490bcf20fd491c1b8f3fc9dd041d8c2a30010

mantisbt.org/bugs/view.php?id=37015

cve.org (CVE-2026-40607)

nvd.nist.gov (CVE-2026-40607)

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