One of the things we do to make sure we are providing our customers with the best data on the vulnerabilities that exist and are being exploited in WordPress plugins is to monitor our websites for hacking attempts. Through that we have found a quite a few vulnerabilities that exist in the current versions of plugins that it looks like hackers have already started exploiting. In the most recent case though we are still not quite sure what the hacker was targeting. Recently we found a hacker probing for usage of the plugin Party Hall Booking Manager, along with five other plugins at the same time. As we started looking over the plugins, one connection we found was that they all contained code that looked susceptible to SQL injections. That type of vulnerability is not one we often see target by hackers, so it is possible there is an additional issue with the plugin.
In a number of places in the code, user input is included in SQL queries without sanitization being done or a parametrized query being used. Below in one of those that we confirmed is exploitable. [Read more]