GHSA-j7v9-f46r-2rp4Medium

MantisBT is Vulnerable to Reflected XSS in Rendering Dynamic Custom Textarea Field

Published
May 11, 2026
Last Modified
June 9, 2026

🔗 CVE IDs covered (1)

CVE-2026-41897 →

📋 Description

Lack of validation of filter_target parameter on return_dynamic_filters.php (normally used as an AJAX in View Issues Page) allows an attacker to inject arbitrary HTML if the target is a TEXTAREA custom field.

Impact

Cross-site scripting (XSS)

Patches

  • c885af13f0b8596714ffe11df757c09f35fbd8f4

Workarounds

None

Credits

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

🎯 Affected products1

  • composer/mantisbt/mantisbt:>= 1.0.0, < 2.28.2

🔗 References (5)