Yesterday, the WordPress plugin Contact Form Submissions was closed on WordPress Plugin Directory. Because that is one of the 1,000 most popular plugins in that directory (it has 50,000+ installs), our systems warned us about the closure and we started checking over the plugin to see if there was a vulnerability we should warn customers of our services about. We actually already were warning our customers, as the plugin still has an unfixed vulnerability we found the last time it was closed. Looking for anything else, we found that some of the code in the plugin isn’t properly secured, though not in a way that looks to normally lead to a vulnerability. What we already knew about was a recent claim of a security issue in the plugin, which we hadn’t yet fully reviewed.

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This post provides insights on a vulnerability in a WordPress plugin 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 the rest of its contents are limited to subscribers of our service.

If you were using our service, you would have already been warned about this vulnerability if your website is vulnerable due to it. You can try out our service for free and then see the rest of the details of the vulnerability.

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