# CVE-2026-41897: MantisBT reflected XSS in return_dynamic_filters.php

Source: https://junglewise.ai/threats/cve-2026-41897-mantisbt-reflected-xss-in-return-dynamic-filters-php  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-28. Updated: 2026-06-09  
License: CC BY 4.0 with a link back

CVE-2026-41897 · Severity: medium · CVSS 4 · Published 2026-05-28

MantisBT, a popular open-source bug tracking system, is vulnerable to a security flaw that allows attackers to inject malicious scripts into the application. By manipulating specific data fields used in the issue viewing page, an attacker could potentially steal user session information or perform unauthorized actions on behalf of other users. This issue affects organizations using MantisBT to manage software defects and project tasks.

Technologies: [MantisBT](https://junglewise.ai/threats/technologies/mantisbt), [mantisbt/mantisbt (Packagist)](https://junglewise.ai/threats/technologies/mantisbt-mantisbt). Vendors: [MantisBT](https://junglewise.ai/threats/vendors/mantisbt), [Packagist](https://junglewise.ai/threats/vendors/packagist).

## Quick answers

**Is CVE-2026-41897 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-41897 being exploited in the wild.

**How severe is CVE-2026-41897?** Medium severity, with a CVSS score of 4, published 28 May 2026.

**Which products and versions are affected?** MantisBT >= 1.0.0, < 2.28.2; mantisbt/mantisbt (Packagist) >= 1.0.0, < 2.28.2, ECOSYSTEM:introduced=1.0.0,fixed=2.28.2.

**Is there a fix for CVE-2026-41897?** Yes. mantisbt/mantisbt (Packagist): upgrade to 2.28.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-41897 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-41897?** Check whether you run MantisBT or mantisbt/mantisbt (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- mantisbt/mantisbt (Packagist): upgrade to 2.28.2 or later

  ```sh
  composer require mantisbt/mantisbt:^2.28.2
  ```


## Technical details

A reflected cross-site scripting (XSS) vulnerability exists in MantisBT due to a lack of validation of the 'filter_target' parameter in 'return_dynamic_filters.php'. This component is typically used via AJAX on the 'View Issues' page. If the target is a TEXTAREA custom field, an attacker can inject arbitrary HTML and JavaScript. Exploitation requires network access and low privileges (PR:L), allowing an attacker to execute scripts in the context of a user's session. The issue is fixed in version 2.28.2.

## Affected products

- MantisBT MantisBT >= 1.0.0, < 2.28.2

## Identifiers

- CVE-2026-41897
- GHSA-j7v9-f46r-2rp4

## Timeline

- 2026-05-11: advisory: GitHub Advisory published
- 2026-05-28: disclosed: NVD publication

## References

- [https://api.github.com/users/siunam321](https://api.github.com/users/siunam321)
- [https://github.com/siunam321](https://github.com/siunam321)
- [https://api.github.com/users/siunam321/gists%7B/gist_id%7D](https://api.github.com/users/siunam321/gists%7B/gist_id%7D)
- [https://api.github.com/users/siunam321/repos](https://api.github.com/users/siunam321/repos)
- [https://avatars.githubusercontent.com/u/104430134?v=4](https://avatars.githubusercontent.com/u/104430134?v=4)
- [https://api.github.com/users/siunam321/events%7B/privacy%7D](https://api.github.com/users/siunam321/events%7B/privacy%7D)

## Related threats

- [MantisBT authentication bypass in SOAP API](https://junglewise.ai/threats/cve-2026-47156-mantisbt-authentication-bypass-in-soap-api)
- [MantisBT stored XSS in print_all_bug_page_word.php](https://junglewise.ai/threats/cve-2026-62944-mantisbt-stored-xss-in-print-all-bug-page-word-php)
- [MantisBT improper input validation in REST and SOAP APIs](https://junglewise.ai/threats/cve-2026-52883-mantisbt-improper-input-validation-in-rest-and-soap-apis)
- [MantisBT authorization bypass in REST and SOAP APIs](https://junglewise.ai/threats/cve-2026-52882-mantisbt-authorization-bypass-in-rest-and-soap-apis)
- [MantisBT reflected XSS in admin/install.php](https://junglewise.ai/threats/cve-2026-52881-mantisbt-reflected-xss-in-admin-install-php)