MEDIUM

GHSA-j7v9-f46r-2rp4

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

Quick fix

GHSA-j7v9-f46r-2rp4 — mantisbt/mantisbt: upgrade to the fixed version with the command below.

composer require mantisbt/mantisbt:^2.28.2

Details

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.

Are you affected?

Enter the version of the package you're using.

Affected packages

Packagist/mantisbt/mantisbt

Introduced in: 1.0.0Fixed in: 2.28.2

Fixcomposer require mantisbt/mantisbt:^2.28.2

References

https://github.com/mantisbt/mantisbt/security/advisories/GHSA-j7v9-f46r-2rp4[WEB]
https://nvd.nist.gov/vuln/detail/CVE-2026-41897[ADVISORY]
https://github.com/mantisbt/mantisbt/commit/c885af13f0b8596714ffe11df757c09f35fbd8f4[WEB]
https://github.com/mantisbt/mantisbt[PACKAGE]
https://mantisbt.org/bugs/view.php?id=37013[WEB]