I just received an email from Wordfence that I thought would be good to share with you. It contains information on WP Super Cache and W3 Total Cache. If you use either of these plugins, please pay close attention.

Dear WordPress Publisher,

If you would like to stop receiving WordPress security alerts and product updates from Wordfence, you can click here.  You subscribed to this list via the Wordfence security plugin for WordPress.

A security hole that allows anyone to execute any command on your WordPress server has been discovered in the WP Super Cache and W3 Total Cache plugins.

WHAT TO DO: Upgrade to the newest version of both these plugins immediately  The security holes have been fixed by the developers.

The impact of these security holes can’t be overstated. They allow anyone to bypass all security and gain complete access to your WordPress site.

The exploit was posted by a user on the WordPress forums. The plugin authors have now updated their code to fix this issue.

The security hole allows an attacker to post PHP code embedded in comments and that code will be executed by your server. This effectively gives them unlimited access to all parts of your site and database.

There have been roughly 6 million downloads of both plugins combined, so they are very popular and this hole is likely to have spawned large scale automated attacks that take advantage of it.

If you run either of these plugins, it’s likely that your system may already have been compromised. Please upgrade both plugins and then run a full Wordfence scan to verify your system integrity.

Regards,

Mark Maunder
Wordfence Creator & Feedjit Inc. CEO.
PS: If you aren’t already a member you can subscribe to our WordPress Security and Product Updates mailing list here. You’re welcome to republish this email in part or in full provided you mention that the source is www.wordfence.com. If you would like to get Wordfence for your WordPress website, simply go to your “Plugin” menu, click “add new” and search for “wordfence”.