Deserialization of Untrusted Data

Overview october/system is a System module for October CMS. Affected versions of this package are vulnerable to Deserialization of Untrusted Data in the SessionMaker process. An attacker can execute arbitrary PHP code by injecting a crafted serialized payload into the widget. session key, which i...

Access Control Bypass

Overview october/system is a System module for October CMS. Affected versions of this package are vulnerable to Access Control Bypass in the cms.safemode process. An attacker can gain unauthorized access to sensitive database information and impersonate other backend users by chaining method call...

CVE-2026-46696: Improper Privilege Management

October System provides the system module for October Content Management System. Versions prior to 3.7.17 and 4.2.21 have a vulnerability in the Twig sandbox security policy that allowed a chained bypass when cms.safemode is enabled. The Laravel session store was exposed to Twig with unrestricted...

CVE-2026-49400: Deserialization of Untrusted Data

October System provides the system module for October Content Management System. Prior to versions 3.7.17 and 4.2.21, the backend SessionMaker trait stored widget session state as base64serialize... and consumed it with unserialize without an allowedclasses restriction. Any code path that could...

CVE-2026-26274: Incomplete List of Disallowed Inputs

October is a Content Management System CMS and web platform. Prior to 3.7.14 and 4.1.10, a vulnerability was identified in the Twig sandbox security policy that allowed database write operations when cms.safemode is enabled. Backend users with Developer permissions could use Twig template markup ...

CVE-2023-44381

October is a Content Management System CMS and web platform to assist with development workflow. An authenticated backend user with the editor.cmspages, editor.cmslayouts, or editor.cmspartials permissions who would normally not be permitted to provide PHP code to be executed by the CMS due to...

CVE-2023-44382

October is a Content Management System CMS and web platform to assist with development workflow. An authenticated backend user with the editor.cmspages, editor.cmslayouts, or editor.cmspartials permissions who would normally not be permitted to provide PHP code to be executed by the CMS due to...

CVE-2022-35944: Improper Control of Generation of Code

October is a self-hosted Content Management System CMS platform based on the Laravel PHP Framework. This vulnerability only affects installations that rely on the safe mode restriction, commonly used when providing public access to the admin panel. Assuming an attacker has access to the admin pan...

CVE-2022-21705: Improper Neutralization of Special Elements in Output Used by a Downstream Component

Octobercms is a self-hosted CMS platform based on the Laravel PHP Framework. In affected versions user input was not properly sanitized before rendering. An authenticated user with the permissions to create, modify and delete website pages can exploit this vulnerability to bypass cms.safemode /...