GHSA-3X4W-MXPF-FHQQ

Vulnerability from github – Published: 2026-03-18 12:58 – Updated: 2026-03-20 21:23
VLAI
Summary
Craft CMS Vulnerable to Stored XSS in Revision Context Menu
Details

The revision/draft context menu in the element editor renders the creator’s fullName as raw HTML due to the use of Template::raw() combined with Craft::t() string interpolation. A low-privileged control panel user (e.g., Author) can set their fullName to an XSS payload via the profile editor, then create an entry with two saves.

If an administrator is logged in and executes a specifically crafted payload while an elevated session is active, the attacker’s account can be elevated to administrator.

Users should update to Craft 5.9.11 with the patch to mitigate the issue.

Severity
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 5.9.10"
      },
      "package": {
        "ecosystem": "Packagist",
        "name": "craftcms/cms"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.9.0-beta.1"
            },
            {
              "fixed": "5.9.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-33051"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-18T12:58:23Z",
    "nvd_published_at": "2026-03-20T06:16:12Z",
    "severity": "MODERATE"
  },
  "details": "The revision/draft context menu in the element editor renders the creator\u2019s `fullName` as raw HTML due to the \nuse of `Template::raw()` combined with `Craft::t()` string interpolation. A low-privileged control panel user\n(e.g., Author) can set their fullName to an XSS payload via the profile editor, then create an entry with two\nsaves.\n\nIf an administrator is logged in and executes a specifically crafted payload while an elevated session is active, the attacker\u2019s account can be elevated to administrator.\n\nUsers should update to Craft 5.9.11 with the patch to mitigate the issue.",
  "id": "GHSA-3x4w-mxpf-fhqq",
  "modified": "2026-03-20T21:23:07Z",
  "published": "2026-03-18T12:58:23Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/cms/security/advisories/GHSA-3x4w-mxpf-fhqq"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33051"
    },
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/cms/commit/f634a9d21edcafd83a6716047d275f985aba6be1"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/craftcms/cms"
    },
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/cms/releases/tag/5.9.11"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Craft CMS Vulnerable to Stored XSS in Revision Context Menu"
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.



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