GHSA-VGP4-2FC4-QFF2 Winter: Stored XSS through Editor Settings custom styles

Impact Authenticated Backend Users with the backend.manageeditor "Manage editor settings" permission can provide custom styles through Settings → Editor Settings → Markup Styles that are compiled through the LESS CSS parser and rendered on every backend page. Previously, the compiled output was n...

PT-2026-76553

Name of the Vulnerable Software and Affected Versions Winter versions 1.2.10 through 1.2.12 Description Authenticated backend users with the backend.manage editor permission can store custom Markup Styles via Settings → Editor Settings → Markup Styles. These styles are compiled by the LESS parser...

CVE-2025-61674

October is a Content Management System CMS and web platform. Prior to versions 3.7.13 and 4.0.12, a cross-site scripting XSS vulnerability was identified in October CMS backend configuration forms. A user with the Global Editor Settings permission could inject malicious HTML/JS into the styleshee...