{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 2.28.3"
      },
      "package": {
        "ecosystem": "Packagist",
        "name": "mantisbt/mantisbt"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.28.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-52881"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-15T18:34:36Z",
    "nvd_published_at": null,
    "severity": "CRITICAL"
  },
  "details": "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 an unescaped printf format string. No authentication is required.\n\nA Content Security Policy (script-src \u0027self\u0027) prevents inline JavaScript execution, but the CSP is missing a form-action directive, allowing exploitation via credential-phishing form injection and \u003cmeta\u003e open redirects.\n\n### Impact\n- 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.\n- Open redirect: Victim is silently redirected to a phishing or malware site.\n- UI manipulation: CSS injection can hide legitimate page content and overlay attacker-controlled HTML, enabling social engineering.\n\n### Patches\n- https://github.com/mantisbt/mantisbt/commit/297773fbb238c39a153bd888431b41a176132098\n\n### Workarounds\nRemove the `/admin` directory, as [recommended in the Admin Guide](https://mantisbt.org/docs/master/en-US/Admin_Guide/html-desktop/#admin.install.postcommon)\n\n### Resources\n- https://mantisbt.org/bugs/view.php?id=37103\n- related advisory [GHSA-77x8-3v3h-hrhv](https://github.com/mantisbt/mantisbt/security/advisories/GHSA-77x8-3v3h-hrhv)\n\n### Credits\nMcCaulay Hudson (@_McCaulay) of watchTowr",
  "id": "GHSA-vcrw-4xvv-jh49",
  "modified": "2026-07-15T18:34:36Z",
  "published": "2026-07-15T18:34:36Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/mantisbt/mantisbt/security/advisories/GHSA-vcrw-4xvv-jh49"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mantisbt/mantisbt/commit/297773fbb238c39a153bd888431b41a176132098"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/mantisbt/mantisbt"
    },
    {
      "type": "WEB",
      "url": "https://mantisbt.org/bugs/view.php?id=37103"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "MantisBT: Reflected XSS in admin/install.php via unescaped printf "
}