Cross-site scripting in MantisBT - CVE-2026-41897
Published: November 6, 2026
Vulnerability identifier: #VU159797
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2026-41897
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote authenticated attacker to execute arbitrary JavaScript in a victim's browser through reflected cross-site scripting in MantisBT.
The vulnerability exists due to missing validation of the filter_target parameter in return_dynamic_filters.php when rendering a TEXTAREA custom field. A remote authenticated attacker can craft a request targeting such a field and induce a victim to open it, causing injected HTML to execute as script.
Affected software
MantisBT
How to mitigate CVE-2026-41897
Install security update from vendor's website.
MantisBT - update to 2.28.2