---
id: CVE-2026-40607
title: Mantis Bug Tracker (MantisBT) is an open source issue tracker
summary: >-
  Mantis Bug Tracker (MantisBT) is an open source issue tracker. In versions
  2.11.0 through 2.28.1, a Stored XSS vulnerability is caused by incorrect
  escaping of a saved filter's owner, allowing an attacker to inject arbitrary
  HTML on syst…
severity: none
cwe:
  - CWE-79
published: '2026-05-22'
updated: '2026-07-23'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-40607'
references:
  - url: >-
      https://github.com/mantisbt/mantisbt/commit/44f490bcf20fd491c1b8f3fc9dd041d8c2a30010
    label: security-advisories@github.com
  - url: >-
      https://github.com/mantisbt/mantisbt/security/advisories/GHSA-f633-865q-2mhh
    label: security-advisories@github.com
  - url: 'https://mantisbt.org/bugs/view.php?id=37015'
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00419
epssPercentile: 0.35845
ingestedAt: '2026-07-23T11:17:34.086Z'
---

## Overview

Mantis Bug Tracker (MantisBT) is an open source issue tracker. In versions 2.11.0 through 2.28.1, a Stored XSS vulnerability is caused by incorrect escaping of a saved filter's owner, allowing an attacker to inject arbitrary HTML on systems where $g_show_user_realname = ON. Note that By default, only users with Manager access level or above can save their filters publicly. This issue has been fixed in version 2.28.2. If developers are unable to update immediately, they can work around this issue by preventing display of users' real names (set $g_ show_user_realname = OFF; in configuration), and restricting the ability to store filters (set $g_stored_query_create_threshold / $g_stored_query_create_shared_threshold to NOBODY).

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.