CVE-2009-3890: WordPress

Medium severity, CVSS 6.0. EPSS: 8.4% chance of exploitation in the next 30 days.

Unrestricted file upload vulnerability in the wp_check_filetype function in wp-includes/functions.php in WordPress before 2.8.6, when a certain configuration of the mod_mime module in the Apache HTTP Server is enabled, allows remote authenticated users to execute arbitrary code by posting an attachment with a multiple-extension filename, and then accessing this attachment via a direct request to a wp-content/uploads/ pathname, as demonstrated by a .php.jpg filename.

Affected products

• WordPress WordPress: up to and including 2.8.5

Published 2009-11-17. Last modified 2026-06-16.