Yesterday we detailed a persistent cross-site scripting (XSS) vulnerability in the plugin Slimstat Analytics and about the same time the discoverer of the vulnerability Sucuri had released a post with similar details, but notably silent about how the vulnerability was fixed. We are not sure why they didn’t include that, but it is important since the fix was less than ideal as instead of using the relevant WordPress escaping function the developer used code that did a more limited version of that function (yesterday we notified the developer that could be better handled). It is always a good idea to not to roll your own security code when you don’t need to, so what happened there might be a sign that the developer doesn’t have the best handle on dealing with the security of WordPress plugins.
This post provides the details of a vulnerability in the WordPress plugin Slimstat Analytics not discovered by us, where the discoverer hadn’t provided the details needed for us to confirm the vulnerability while we were adding it to the data set for our service, so its contents are limited to subscribers of our service. If you are not currently a subscriber, you can try out the service for free and then you can view the contents of the post. There are a lot of other reason that you will want to sign up beyond access to posts like this one, including that you would have already been warned about this vulnerability if your website was vulnerable due to it.
If you want the best information and therefore best protection against vulnerabilities in WordPress plugins we provide you that through our service.
We recently started proactively monitoring for evidence of some high risk vulnerabilities when changes are made to WordPress plugins and if we had more customers we could expand the proactive monitoring to more types of vulnerabilities. One of the types of vulnerabilities we are looking for are PHP object injection vulnerabilities since those are likely to be exploited if hackers become aware of them. Through that we came across an authenticated PHP object injection vulnerability in Slimstat Analytics.