GHSA-77x8-3v3h-hrhv — MantisBT: Reflected XSS in admin/install.php

The advisory, in context

MantisBT 2.28.3 and earlier contains six reflected XSS injection points in /admin/install.php. User-supplied parameters are echoed into HTML without escaping via print_test_result(). No authentication is required.

A Content Security Policy (script-src 'self') prevents inline JavaScript execution, but the CSP is missing a form-action directive, allowing exploitation via credential-phishing form injection and <meta> open redirects.

Impact

Credential phishing: Attacker crafts a URL that renders a fake login form on the real MantisBT admin page. Admin credentials are submitted to an attacker-controlled server.
Open redirect: Victim is silently redirected to a phishing or malware site.
UI manipulation: CSS injection can hide legitimate page content and overlay attacker-controlled HTML, enabling social engineering.

Patches

Workarounds

Remove the /admin directory, as recommended in the Admin Guide

Resources

https://mantisbt.org/bugs/view.php?id=37103
related advisory GHSA-vcrw-4xvv-jh49

Credits

McCaulay Hudson (@_McCaulay) of watchTowr

Affected packages

Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.

mantisbt/mantisbt Packagist

Ecosystem versions

Earlier releases before 2.28.4

Fixed in 2.28.4

78 explicitly affected versions

2.10.0, 2.10.1, 2.11.0, 2.11.1, 2.12.0, 2.12.1, 2.12.2, 2.13.0, 2.13.1, 2.13.2, 2.14.0, 2.15.0, 2.15.1, 2.16.0, 2.16.1, 2.17.0, 2.17.1, 2.17.2, 2.18.0, 2.18.1, 2.19.0, 2.19.1, 2.20.0, 2.20.1, 2.21.0, 2.21.1, 2.21.2, 2.21.3, 2.22.0, 2.22.1, 2.22.2, 2.23.0, 2.23.1, 2.24.0, 2.24.1, 2.24.2, 2.24.3, 2.24.4, 2.24.5, 2.25.0, 2.25.1, 2.25.2, 2.25.3, 2.25.4, 2.25.5, 2.25.6, 2.25.7, 2.25.8, 2.26.0, 2.26.1, 2.26.2, 2.26.3, 2.26.4, 2.27.0, 2.27.1, 2.27.2, 2.27.3, 2.28.0, 2.28.1, 2.28.2, 2.28.3, 2.3.0, 2.3.1, 2.3.2, 2.3.3, 2.4.0, 2.4.1, 2.4.2, 2.5.0, 2.5.1, 2.5.2, 2.6.0, 2.7.0, 2.7.1, 2.8.0, 2.8.1, 2.9.0, 2.9.1

View affected-version evidence

{
  "ranges": [
    {
      "events": [
        {
          "introduced": "0"
        },
        {
          "fixed": "2.28.4"
        }
      ],
      "type": "ECOSYSTEM"
    }
  ],
  "versions": [
    "2.10.0",
    "2.10.1",
    "2.11.0",
    "2.11.1",
    "2.12.0",
    "2.12.1",
    "2.12.2",
    "2.13.0",
    "2.13.1",
    "2.13.2",
    "2.14.0",
    "2.15.0",
    "2.15.1",
    "2.16.0",
    "2.16.1",
    "2.17.0",
    "2.17.1",
    "2.17.2",
    "2.18.0",
    "2.18.1",
    "2.19.0",
    "2.19.1",
    "2.20.0",
    "2.20.1",
    "2.21.0",
    "2.21.1",
    "2.21.2",
    "2.21.3",
    "2.22.0",
    "2.22.1",
    "2.22.2",
    "2.23.0",
    "2.23.1",
    "2.24.0",
    "2.24.1",
    "2.24.2",
    "2.24.3",
    "2.24.4",
    "2.24.5",
    "2.25.0",
    "2.25.1",
    "2.25.2",
    "2.25.3",
    "2.25.4",
    "2.25.5",
    "2.25.6",
    "2.25.7",
    "2.25.8",
    "2.26.0",
    "2.26.1",
    "2.26.2",
    "2.26.3",
    "2.26.4",
    "2.27.0",
    "2.27.1",
    "2.27.2",
    "2.27.3",
    "2.28.0",
    "2.28.1",
    "2.28.2",
    "2.28.3",
    "2.3.0",
    "2.3.1",
    "2.3.2",
    "2.3.3",
    "2.4.0",
    "2.4.1",
    "2.4.2",
    "2.5.0",
    "2.5.1",
    "2.5.2",
    "2.6.0",
    "2.7.0",
    "2.7.1",
    "2.8.0",
    "2.8.1",
    "2.9.0",
    "2.9.1"
  ]
}

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MantisBT: Reflected XSS in admin/install.php