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EUVD-2026-323065

fkie_cve-2026-41897

Mantis Bug Tracker (MantisBT) is an open source issue tracker. From 1.0.0 to 2.28.1, 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. This vulnerability is fixed in 2.28.2.

GHSA-j7v9-f46r-2rp4 — MantisBT is Vulnerable to Reflected XSS in Rendering Dynamic Custom Textarea Field

Affected: Packagist: mantisbt/mantisbt

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.