MantisBT <=2.28.1 Code Exec via Inline File CSRF
CVE-2026-44657 Published on May 28, 2026
MantisBT: Stored XSS in File Download
Mantis Bug Tracker (MantisBT) is an open source issue tracker. Prior to 2.28.2, using show_inline=1 parameter and a valid file_show_inline_token CSRF token on file_download.php, an attacker can execute code by uploading a crafted XHTML attachment referencing a JavaScript attachment. This vulnerability is fixed in 2.28.2.
Weakness Type
What is a XSS Vulnerability?
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CVE-2026-44657 has been classified to as a XSS vulnerability or weakness.
Products Associated with CVE-2026-44657
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Affected Versions
mantisbt Version < 2.28.2 is affected by CVE-2026-44657Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.