CVE-2021-33557: Mantisbt

Medium severity, CVSS 6.1. EPSS: 1.8% chance of exploitation in the next 30 days.

An XSS issue was discovered in manage_custom_field_edit_page.php in MantisBT before 2.25.2. Unescaped output of the return parameter allows an attacker to inject code into a hidden input field.

Affected products

• Mantisbt Mantisbt: before 2.25.2 (fixed in 2.25.2)

Published 2021-06-17. Last modified 2026-06-17.