https://cve.radiocsirt.org/rss/recent/all/10 Most recent entries from all 2026-10-05T21:04:18.861753+00:00 Vulnerability-Lookup csirt@opendfir.org python-feedgen Contains only the most 10 recent entries. https://cve.radiocsirt.org/vuln/euvd-2026-265421 EUVD-2026-265421 2026-10-05T21:04:18.915532+00:00 EUVD-2026-265421 https://cve.radiocsirt.org/vuln/fkie_cve-2025-61676 fkie_cve-2025-61676 2026-10-05T21:04:18.915582+00:00

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) vulnerabilities was identified in October CMS backend configuration forms. A user with the Customize Backend Styles permission could inject malicious HTML/JS into the stylesheet input at Styles from Branding & Appearance settings. A specially crafted input could break out of the intended <style> context, allowing arbitrary script execution across backend pages for all users. This issue has been patched in versions 3.7.13 and 4.0.12.

 https://cve.radiocsirt.org/vuln/ghsa-wvpq-h33f-8rp6 GHSA-wvpq-h33f-8rp6 — October CMS Vulnerable to Stored XSS via Branding Styles 2026-10-05T21:04:18.915640+00:00

Affected: Packagist: october/system

A cross-site scripting (XSS) vulnerabilities was identified in October CMS backend configuration forms:

- **Branding and Appearances Styles** A user with the `Customize Backend Styles` permission could inject malicious HTML/JS into the stylesheet input at *Settings → Branding & Appearance → Styles*.

A specially crafted input could break out of the intended `<style>` context, allowing arbitrary script execution across backend pages for all users.

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### Impact - Persistent XSS across the backend interface. - Exploitable by lower-privileged accounts with the above permissions. - Potential consequences include privilege escalation, session hijacking, and execution of unauthorized actions in victim sessions.

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### Patches The vulnerability has been patched in **v4.0.12** and **v3.7.13**. Stylesheet inputs are now sanitized to prevent injection of arbitrary HTML/JS.

All users are strongly encouraged to upgrade to the latest patched version.

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### Workarounds If upgrading immediately is not possible: - Restrict the permissions `Customize Backend Styles` to fully trusted administrators only.

This reduces exposure but does not fully eliminate risk.

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### Credits - Reported by **[Nakkouch Tarek](https://github.com/nakkouchtarek)**