CVE-2026-56381

MEDIUM

Craft CMS - Stored XSS via User Group Name in User Permissions Page

Title source: cna
STIX 2.1

Description

Craft CMS from version 5.0.0-RC1 contains a stored cross-site scripting vulnerability in the User Permissions page where user group names are rendered without proper HTML escaping. Attackers with admin access can inject arbitrary JavaScript via the user group name field that executes when other users view or edit permissions.

References (2)

Core 2
Core References
Vendor Advisory vendor-advisory
GHSA Advisory GHSA-g3hp-vvqf-8vw6
https://github.com/craftcms/cms/security/advisories/GHSA-g3hp-vvqf-8vw6
Third Party Advisory third-party-advisory
VulnCheck Advisory: Craft CMS - Stored XSS via User Group Name in User Permissions Page
https://www.vulncheck.com/advisories/craft-cms-stored-xss-via-user-group-name-in-user-permissions-page

Scores

CVSS v3 4.8
EPSS 0.0015
EPSS Percentile 4.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (2)
craftcms/cms 5.0.0-RC1 - 5.8.22
craftcms/cms 5.8.22
Published Jun 21, 2026
Tracked Since Jun 21, 2026