WordPress 3.5.2 is now available. This is the second maintenance release of 3.5, fixing 12 bugs. This is a security release for all previous versions and we strongly encourage you to update your sites immediately. The WordPress security team resolved seven security issues, and this release also contains some additional security hardening.

The security fixes included:

Blocking server-side request forgery attacks, which could potentially enable an attacker to gain access to a site.

Disallow contributors from improperly publishing posts, reported by Konstantin Kovshenin, or reassigning the post’s authorship, reported by Luke Bryan.

An update to the SWFUpload external library to fix cross-site scripting vulnerabilities. Reported by mala and Szymon Gruszecki. (Developers: More on SWFUpload here.)

Prevention of a denial of service attack, affecting sites using password-protected posts.

An update to an external TinyMCE library to fix a cross-site scripting vulnerability. Reported by Wan Ikram.

Multiple fixes for cross-site scripting. Reported by Andrea Santese and Rodrigo.

Avoid disclosing a full file path when a upload fails. Reported by Jakub Galczyk.

We appreciated responsible disclosure of these issues directly to our security team. For more information on the changes, see the release notes or consult the list of changes.

Download WordPress 3.5.2 or update now from the Dashboard → Updates menu in your site’s admin area.

Also: WordPress 3.6 Beta 4: If you are testing WordPress 3.6, please note that WordPress 3.6 Beta 4 (zip) includes fixes for these security issues.

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