GitHub Advisoryadvisory · Packagist

GHSA-3x4w-mxpf-fhqq Craft CMS Vulnerable to Stored XSS in Revision Context Menu

MEDIUM Published 2026-03-18 Modified 2026-03-20 Official page ↗
Aliases
CVE-2026-33051
Ecosystem
Packagist
Packages
craftcms/cms
Severity
Moderate
CVSS vector
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
Weaknesses
CWE-79
Reviewed
2026-03-18

Affected packages

• Packagist craftcms/cms: >= 5.9.0-beta.1, < 5.9.11 → fixed in 5.9.11

Description

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.

Related

Alias · CVE (1)

  • CVE-2026-33051 Craft CMS is a content management system (CMS). vulnerability

Weakness · CWE (1)

  • CWE-79 Improper Neutralization of Input During Web Page Generation weakness

References