While we already are far ahead of other companies in keeping up with vulnerabilities in WordPress plugins (amazingly that isn’t an exaggeration), in looking in to how we could get even better we noticed that in a recent instance were a vulnerability was exploited in a plugin, we probably could have warned our customers about the vulnerability even sooner if we had looked at the plugin when it was first closed on the Plugin Directory instead of when the vulnerability was fixed (though as far as we are aware the exploitation started after we had warned our customers of the fix). So we are now monitoring to see if any of the 1,000 most popular plugins are closed on the Plugin Directory and then seeing if it looks like that was due to a vulnerability.
If you needed yet another reminder of the poor security of WordPress plugins, here is one. For the second time this week one of the 1,000 most popular WordPress plugins has been closed and we have found that it contains a rather easy to spot vulnerability, which doesn’t even appear to be the cause of it being removed. This time it involves the plugin Plugin PayPal for WooCommerce was closed yesterday and has 40,000+ installs according to wordpress.org. The explanation for its closure from the developer is not something we quite understand: