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...

EUVD-2026-77682

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-2026-49400

October CMS (System module) prior to v3.7.17 and v4.2.21 is affected by a PHP object injection vulnerability in the backend SessionMaker trait, which stored widget session state as base64(serialize(...)) and deserialized it with unserialize() without an allowed_classes restriction. Exploitation r...

October CMS: PHP Object Injection via Backend Widget Session Storage

The backend SessionMaker trait stored widget session state as base64serialize... and consumed it with unserialize without an allowedclasses restriction. Any code path that could write to a widget. session key with attacker-controlled bytes could trigger PHP object injection the next time the widg...

GHSA-2FF2-MX52-Q8WP October CMS: PHP Object Injection via Backend Widget Session Storage

The backend SessionMaker trait stored widget session state as base64serialize... and consumed it with unserialize without an allowedclasses restriction. Any code path that could write to a widget. session key with attacker-controlled bytes could trigger PHP object injection the next time the widg...

Wordfence Argus Identifies Two Critical Unauthenticated Vulnerability Chains Leading to Remote Code Execution in The Events Calendar Plugin

On August 21 and August 22, 2026, Wordfence Argus, created by the Wordfence Threat Intelligence team, identified two independent critical vulnerability chains in The Events Calendar, a WordPress plugin active on more than 600,000 websites. Both chains begin in the plugin's widget-rendering pipeli...

WordPress wpstorecart plugin <= 5.0.7 - Unauthenticated PHP Object Injection vulnerability

Unauthenticated PHP Object Injection vulnerability discovered by reconnaissance in WordPress Plugin WPStoreCart versions = 5.0.7...

PT-2026-91835

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 write to a widget. session key with attacker-controlled bytes could trigger PHP object injection the next time the...

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-2026-82222-PoC

CVE-2026-82222 — GiveWP Unauthenticated PHP Object Injection → RCE Lab + proof-of-concept for CVE-2026-82222 : unauthenticated PHP object injection leading to remote code execution in the GiveWP WordPress donation plugin = 4.16.7.1 patched in 4.16.7.2...

Exploit for CVE-2026-71294

Cotonti CommentsWidget PHP Object Injection PoC Safe local pr...

PT-2026-91278

Name of the Vulnerable Software and Affected Versions October CMS versions prior to 3.7.17 October CMS versions prior to 4.2.21 Description The backend SessionMaker trait stores widget session state using base64serialize... and processes it with the unserialize function without an allowed classes...

Exploit for CVE-2026-78006

CVE-2026-78006-POC POC for CVE-2026-78006 The Events Calendar...

CVE-2026-78175

The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 4.0.7 via the withdrawmethodfield parameter of the tutorsavewithdrawaccount AJAX handler. This is due to the handler lacking any capability or role...

EUVD-2026-76834

The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 4.0.7 via the withdrawmethodfield parameter of the tutorsavewithdrawaccount AJAX handler. This is due to the handler lacking any capability or role...

CVE-2026-78175 Tutor LMS <= 4.0.7 - Authenticated (Subscriber+) PHP Object Injection to Remote Code Execution

The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 4.0.7 via the withdrawmethodfield parameter of the tutorsavewithdrawaccount AJAX handler. This is due to the handler lacking any capability or role...

CVE-2026-78175

Tutor LMS (WordPress eLearning plugin) is vulnerable to PHP Object Injection in versions up to and including 4.0.7 via the withdraw_method_field parameter of the tutor_save_withdraw_account AJAX handler. The handler relies solely on a nonce without capability checks, and a flaw in how esc_sql() h...

CVE-2026-78006 The Events Calendar <= 6.17.4 - Unauthenticated PHP Object Injection to Remote Code Execution

The The Events Calendar plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 6.17.4 via the issafewidgetinstance function. This is due to insufficient protection in issafewidgetinstance, which can be bypassed because PHP fires magic methods during its...

CVE-2026-82845

The Masteriyo LMS WordPress plugin before 3.4.1 does not prevent user-supplied values held as metadata from being deserialized when they are read back, allowing users with a minimal account to inject arbitrary PHP objects and, by way of a class shipped in a library bundled with the Masteriyo LMS...

CVE-2026-84099 IDB Ecommerce (wpStoreCart 5) <= 5.0.7 - Unauthenticated PHP Object Injection via bundled wpsc-membership-pro paypal.php

The wpstorecart WordPress plugin through 5.0.7 does not prevent direct, unauthenticated access to a bundled add-on that deserializes user-supplied input without restricting the permitted classes, allowing unauthenticated attackers to inject arbitrary PHP objects, which may be escalated further wh...