CVE-2026-49400 October CMS: PHP Object Injection via Backend Widget Session Storage

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...

PT-2026-91278

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 allowed classes restriction. Any code path that could...

October System module has an Open Redirect for Administrator Accounts

Impact This advisory affects authenticated administrators who may be redirected to an untrusted URL using the PageFinder schema. The resolver for the page finder link schema october:// allowed external links, therefore allowing an open redirect outside the scope of the active host. This...

October System module has a Reflected XSS via X-October-Request-Handler Header

Impact The X-October-Request-Handler Header does not sanitize the AJAX handler name and allows unescaped HTML to be reflected back. There is no impact since this vulnerability cannot be exploited through normal browser interactions. This unescaped value is only detectable when using a proxy...

VulnCheck KEV: CVE-2021-32648

In affected versions of the october/system package an attacker can request an account password reset and then gain access to the account using a specially crafted request...

Octobercms 安全漏洞

Octobercms is a Php-based Cms website builder from the US company Octobercms. A security vulnerability exists in octobercms october, which originates in an affected version of the october/system package, where an attacker can request a reset of an account password and then use a specially crafted...