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3.0.4 Important Security Update

Posted December 29, 2010 by Matt Mullenweg. Filed under Releases, Security.

Version 3.0.4 of WordPress, available immediately through the update page in your dashboard or for download here, is a very important update to apply to your sites as soon as possible because it fixes a core security bug in our HTML sanitation library, called KSES. I would rate this release as “critical.”

This issue affects all versions of WordPress prior to 3.0.4, so if you are still on a 2.X release you need to update as well.

I realize an update during the holidays is no fun, but this one is worth putting down the eggnog for. In the spirit of the holidays, consider helping your friends as well.

If you are a security researcher, we’d appreciate you taking a look over this changeset as well to review our update. We’ve given it a lot of thought and review but since this is so core we want as many brains on it as possible. Thanks to Mauro Gentile and Jon Cave (duck_) who discovered and alerted us to these XSS vulnerabilities first.

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See Also:

For more WordPress news, check out the WordPress Planet.

There’s also a development P2 blog.

To see how active the project is check out our Trac timeline, it often has 20–30 updates per day.

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