Cross-site scripting in MantisBT - CVE-2026-62944
Published: November 6, 2026
Vulnerability identifier: #VU159810
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-2026-62944
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an authenticated attacker to execute stored cross-site scripting in a user's browser, with impact limited by MantisBT's Content Security Policy.
The vulnerability exists due to missing output encoding of image attachment filenames in the image alt attribute generated by print_all_bug_page_word.php. An authenticated attacker can upload an image with a crafted filename that injects a JavaScript event handler when a victim views the HTML export page.
Affected software
MantisBT
How to mitigate CVE-2026-62944
Install security update from vendor's website.
MantisBT - update to 2.28.4