The latest version of the plugin Export Users to CSV doesn’t have a changelog, which it turns out is not the only issue with it. The Subversion commit for the new version does have a log entry and that is “Security Updates”. Looking at the changes made in that version we found that previously the plugin saved files with the WordPress users data in a way that an attacker might be able to access.
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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.
This week six of these plugins were closed and two of them has been reopened. [Read more]