GHSA-p6fr-rxq7-xcg8High

MantisBT Vulnerable to Stored XSS in File Download

Published
May 11, 2026
Last Modified
June 9, 2026

🔗 CVE IDs covered (1)

CVE-2026-44657 →

📋 Description

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.

Impact

Cross-site scripting

Patches

  • 26647b2e68ba30b9d7987d4e03d7a16416684bc2

Workarounds

None

Credits

Thanks to siunam (Tang Cheuk Hei) for discovering and responsibly reporting the issue.

🎯 Affected products1

  • composer/mantisbt/mantisbt:<= 2.28.1

🔗 References (6)