Last month we released an authenticated remote code execution (RCE) vulnerability in WordPress 5.0. This blog post reveals another critical exploit chain for WordPress 5.1 that enables an unauthenticated attacker to gain remote code execution on any WordPress installation prior to version 5.1.1 (CVE-2019-9787).

Today’s gift in our advent calendar contains descriptions of vulnerabilities in Kliqqi, the successor to the popular Pligg CMS mostly used for the creation of interactive social communities. Due to missing CSRF protection, an attacker is able to prepare a website that ultimately leads to code execution on the applications server when visited by a target.

Redaxo 5.2.0 is the latest release of a simple content management system that is mostly used in Germany. Today we are going to present our scan results for Redaxo and explain how completely omitting anti-CSRF measures can have a significant security impact.