GHSA-X6VR-Q3VF-VQGQ

Vulnerability from github – Published: 2025-11-25 23:53 – Updated: 2025-11-27 09:01
VLAI?
Summary
REDAXO CMS is vulnerable to Reflected XSS in Mediapool Info Banner via args[types]
Details

Summary

A reflected Cross-Site Scripting (XSS) vulnerability exists in the Mediapool view where the request parameter args[types] is rendered into an info banner without HTML-escaping. This allows arbitrary JavaScript execution in the backend context when an authenticated user visits a crafted link while logged in.

Details

Control Flow:

  1. redaxo/src/addons/mediapool/pages/index.php reads args via rex_request('args', 'array') and passes them through as $argUrl to media.list.php.
  2. redaxo/src/addons/mediapool/pages/media.list.php injects $argUrl['args']['types'] into an HTML string without escaping:
if (!empty($argUrl['args']['types'])) {
    echo rex_view::info(rex_i18n::msg('pool_file_filter') . ' <code>' . $argUrl['args']['types'] . '</code>');
}

PoC

  1. Log into the REDAXO backend.
  2. While authenticated, open a crafted URL like: <host>/index.php?page=mediapool/media&args[types]="><img+src%3Dx+onerror%3Dalert%28document.domain%29>
  3. The info banner displays the unescaped value and activates the injected onerror handler, which opens an alert pop-up.

Impact

Arbitrary JavaScript execution in the backend, enabling theft of session cookies, CSRF tokens, or other sensitive data, and allowing an attacker to perform any administrative actions on behalf of the affected user.

Severity ?
6.1 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Show details on source website
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "redaxo/source"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.20.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-66026"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-11-25T23:53:04Z",
    "nvd_published_at": "2025-11-26T03:15:58Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\nA reflected Cross-Site Scripting (XSS) vulnerability exists in the Mediapool view where the request parameter `args[types]` is rendered into an info banner without HTML-escaping. This allows arbitrary JavaScript execution in the backend context when an authenticated user visits a crafted link while logged in.\n\n### Details\n\nControl Flow:\n\n1. `redaxo/src/addons/mediapool/pages/index.php` reads args via `rex_request(\u0027args\u0027, \u0027array\u0027)` and passes them through as `$argUrl` to `media.list.php`.\n2. `redaxo/src/addons/mediapool/pages/media.list.php` injects `$argUrl[\u0027args\u0027][\u0027types\u0027]` into an HTML string without escaping:\n\n```\nif (!empty($argUrl[\u0027args\u0027][\u0027types\u0027])) {\n    echo rex_view::info(rex_i18n::msg(\u0027pool_file_filter\u0027) . \u0027 \u003ccode\u003e\u0027 . $argUrl[\u0027args\u0027][\u0027types\u0027] . \u0027\u003c/code\u003e\u0027);\n}\n```\n\n### PoC\n\n1. Log into the REDAXO backend.\n2. While authenticated, open a crafted URL like: `\u003chost\u003e/index.php?page=mediapool/media\u0026args[types]=\"\u003e\u003cimg+src%3Dx+onerror%3Dalert%28document.domain%29\u003e`\n4. The info banner displays the unescaped value and activates the injected onerror handler, which opens an alert pop-up.\n\n### Impact\nArbitrary JavaScript execution in the backend, enabling theft of session cookies, CSRF tokens, or other sensitive data, and allowing an attacker to perform any administrative actions on behalf of the affected user.",
  "id": "GHSA-x6vr-q3vf-vqgq",
  "modified": "2025-11-27T09:01:42Z",
  "published": "2025-11-25T23:53:04Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/redaxo/redaxo/security/advisories/GHSA-x6vr-q3vf-vqgq"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-66026"
    },
    {
      "type": "WEB",
      "url": "https://github.com/redaxo/redaxo/commit/58929062312cf03e344ab04067a365e6b6ee66aa"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/redaxo/redaxo"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "REDAXO CMS is vulnerable to Reflected XSS in Mediapool Info Banner via args[types]"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.