GHSA-3PVF-VXRV-HH9C

Vulnerability from github – Published: 2026-03-24 16:53 – Updated: 2026-03-25 20:59
VLAI?
Summary
Craft CMS: Low-privilege users could read private asset contents when editing an asset (IDOR)
Details

Summary

A low-privileged authenticated user can read private asset content by calling assets/edit-image with an arbitrary assetId that they are not authorized to view.

The endpoint returns image bytes (or a preview redirect) without enforcing a per-asset view authorization check, leading to potential unauthorized disclosure of private files.

Details

Root cause: - A user-controlled object reference (assetId) is used to load and return sensitive content. - The action does not verify whether the current user is authorized to view that asset. - This creates an authenticated IDOR / authorization bypass.

Impact

  • Craft installations where private/non-public assets exist and low-privileged users can authenticate.

Resources

https://github.com/craftcms/cms/commit/7290d91639e

Severity ?
4.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 4.17.7"
      },
      "package": {
        "ecosystem": "Packagist",
        "name": "craftcms/cms"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.0.0-RC1"
            },
            {
              "fixed": "4.17.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 5.9.13"
      },
      "package": {
        "ecosystem": "Packagist",
        "name": "craftcms/cms"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.0.0-RC1"
            },
            {
              "fixed": "5.9.14"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-33158"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-639"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-24T16:53:24Z",
    "nvd_published_at": "2026-03-24T18:16:09Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\n\nA low-privileged authenticated user can read private asset content by calling `assets/edit-image` with an arbitrary `assetId` that they are not authorized to view.\n\nThe endpoint returns image bytes (or a preview redirect) without enforcing a per-asset view authorization check, leading to potential unauthorized disclosure of private files.\n\n### Details\n\nRoot cause:\n  - A user-controlled object reference (`assetId`) is used to load and return sensitive content.\n  - The action does not verify whether the current user is authorized to view that asset.\n  - This creates an authenticated IDOR / authorization bypass.\n\n### Impact\n\n- Craft installations where private/non-public assets exist and low-privileged users can authenticate.\n\n## Resources\n\nhttps://github.com/craftcms/cms/commit/7290d91639e",
  "id": "GHSA-3pvf-vxrv-hh9c",
  "modified": "2026-03-25T20:59:46Z",
  "published": "2026-03-24T16:53:24Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/cms/security/advisories/GHSA-3pvf-vxrv-hh9c"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33158"
    },
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/cms/commit/7290d91639e5e3a4f7e221dfbef95c9b77331860"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/craftcms/cms"
    },
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/cms/releases/tag/4.17.8"
    },
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/cms/releases/tag/5.9.14"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Craft CMS: Low-privilege users could read private asset contents when editing an asset (IDOR)"
}


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Detection rules are retrieved from Rulezet.