CVE-2026-32258: Wintercms Winter

High severity, CVSS 8.1. EPSS: 0.4% chance of exploitation in the next 30 days.

Winter is a free, open-source content management system (CMS) based on the Laravel PHP framework. From 1.2.10 through 1.2.12, authenticated backend users with the backend.manage_editor permission can store custom Markup Styles that are compiled by the LESS parser and rendered without sanitization on every backend page, allowing stored cross-site scripting. This issue is fixed in version 1.2.13.

Affected products

• Wintercms Winter: from 1.2.10, before 1.2.13 (fixed in 1.2.13)

Published 2026-08-26. Last modified 2026-09-09.