Cross-site scripting in MantisBT - CVE-2026-40607
Published: November 6, 2026
Vulnerability identifier: #VU159798
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2026-40607
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a privileged remote attacker to execute arbitrary JavaScript in another user's browser.
The vulnerability exists due to incorrect escaping of the saved-filter owner column in MantisBT when $g_show_user_realname is enabled. A privileged remote attacker can publish a saved filter containing malicious owner content that executes when a victim views the listing, with Manager access or higher required by default to publish filters.
Affected software
MantisBT
How to mitigate CVE-2026-40607
Install security update from vendor's website.
MantisBT - update to 2.28.2