October security vulnerabilities

October is an open-source content management system CMS and network platform developed by October. Versions prior to October 3.7.14 and 4.1.10 contained security vulnerabilities. These vulnerabilities were caused by improper handling of CSS preprocessor files, which could allow backend users with...

CVE-2026-24907

October is a Content Management System CMS and web platform. Versions prior to 3.7.14 and 4.1.10 contain a stored cross-site scripting XSS vulnerability in the Event Log mail preview feature. When viewing logged mail messages, HTML content was rendered in an iframe without proper sandboxing,...

CVE-2025-61676

CVE-2025-61676 affects October CMS prior to 3.7.13 and 4.0.12, where a stored XSS in the backend configuration form (Branding & Appearance → Styles) could be injected by users with Customize Backend Styles permission. A crafted input in the stylesheet field could break out of the context, enabli...