PT-2026-51234 · Craft Cms · Cms

Mhe4Am · Published 2026-06-21 · Updated 2026-06-21 · CVE-2026-56393

Positive Technologies (AI Summary)

CVSS v3.1

4.8

Medium

Base vector

AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Craft CMS versions 4.0.0-RC1 through 4.17.0-beta.1 Craft CMS versions 5.0.0-RC1 through 5.9.0-beta.1

Description Stored cross-site scripting occurs when settings names and field option labels are rendered without sanitization, specifically within the 'checkbox.twig' template using the label|raw filter. An authenticated administrator with allowAdminChanges enabled can inject malicious payloads into section names, volume names, user group names, global set names, generated field names, checkbox/radio option labels, and custom source labels. This allows arbitrary JavaScript to execute within the control-panel sessions of other users.

Recommendations Update to version 4.17.0-beta.1 or later. Update to version 5.9.0-beta.1 or later.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-56393

Affected Products

Cms

References · 6

• https://github.com/craftcms/cms/security/advisories/GHSA-4mgv-366x-qxvx · Vendor Advisory
• https://github.com/craftcms/cms/commit/943152d2246b36f12adf161a03b8695b773d9276 · Patch
• https://github.com/craftcms/cms/commit/67780a778c6ec04e68e64a0b1177c168306144a2 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-56393 · Security Note
• https://twitter.com/VulmonFeeds/status/2068718538475380761 · Twitter Post
• https://vulncheck.com/advisories/craft-cms-multiple-stored-cross-site-scripting-in-settings-names-and-field-options · Note