One of the ways we help to improve the security of WordPress plugins, not just for our customers, but for everyone using them, is the proactive monitoring of changes made to plugins in the Plugin Directory to try to catch serious vulnerabilities before they are exploited. That sometimes leads to us catching a vulnerability of a more limited variant of one of those serious vulnerability types, which isn’t as much concern for the average website, but could be utilized in a targeted attack. That happened with the authenticated PHP object injection vulnerability we found being introduced in to the plugin Blog2Social: Social Media Auto Post & Scheduler just days ago. This vulnerability could allow an attacker that had access to a WordPress account to exploit a PHP object injection vulnerability. It also could have allowed an attacker that could get a user logged in to WordPress to visit a URL the attacker controls, to exploit the vulnerability as well.

Since the check used to spot this is also included in our Plugin Security Checker (which  is accessible through a WordPress plugin of its own), it is another of reminder of how that can help to indicate which plugins are in greater need of security review (for which we do as part of our service as well as separately). [Read more]