On April 5 due to our proactive monitoring of changes made to plugins in the Plugin Directory to try to catch serious vulnerabilities we disclosed an arbitrary file upload vulnerability we spotted in the plugin SupportCandy. A week after our disclosure Christian Angel independently found the vulnerability. The vulnerability was fixed on April 17.
When it comes to security of WordPress plugins, what other security companies generally do is to add protection against vulnerabilities after they have already been widely exploited, which it should be pretty obvious doesn’t produce good results. By comparison, we do proactive monitoring of changes made to plugins in the Plugin Directory to try to catch serious vulnerabilities, but we only have so much time to do that with the amount of customers we have, so we have a backlog of possible vulnerabilities that didn’t look like serious issues that we haven’t had time to get to. Sometimes, as is the case, with the plugin SupportCandy when the plugin comes up again with that proactive monitoring we realize that vulnerability was more serious, as the plugin contains an arbitrary file upload vulnerability, which is the kind that hackers are likely to exploit.