CVE-2013-0731: Mailup Wp-Mailup

Medium severity, CVSS 5.0. EPSS: 2.6% chance of exploitation in the next 30 days.

ajax.functions.php in the MailUp plugin before 1.3.3 for WordPress does not properly restrict access to unspecified Ajax functions, which allows remote attackers to modify plugin settings and conduct cross-site scripting (XSS) attacks by setting the wordpress_logged_in cookie. NOTE: this is due to an incomplete fix for a similar issue that was fixed in 1.3.2.

Affected products

• Mailup Wp-Mailup: up to and including 1.3.2; version 1.0.0 only; version 1.1.0 only; version 1.1.1 only; version 1.1.2 only; version 1.1.3 only; …

Published 2013-03-22. Last modified 2026-06-16.