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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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Wp Mailup Plugin | — | Update wp-mailup plugin to version 1.3.3, or a newer patched version | May 15, 2025 | Mar 13, 2013 |
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