The holiday season is coming up again and it’s time for some security fun. For the third time in a row, we are proud to announce our PHP security advent calendar. This year, we will analyze 24 exciting security bugs that we detected in the most widespread WordPress plugins.

Pydio is a popular file sharing solution used by enterprises and governments around the world. It suffered from a highly critical vulnerability that allowed unauthenticated attackers to compromise the entire file sharing server and to execute arbitrary code on the remote machine (CVE-2018-20718). Find out more about the impact and technical details in our blog post.

A flaw in the way WordPress handles privileges can lead to a privilege escalation in WordPress plugins. This affects for example WooCommerce, the most popular e-commerce plugin with over 4 million installations. The vulnerability allows shop managers to delete certain files on the server and then to take over any administrator account (CVE-2018-20714).

WordPress is the most frequently installed web application in the world. The system is operated not only by experienced developers but also by beginners. In this blog post, we summarize what to look out for when configuring your WordPress installation’s security.

A very common and critical vulnerability in PHP applications is PHP Object Injection. This blog post explains how they work and how they can lead to a full site takeover by remote attackers.