Description
The Stop Spammers Classic plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 2026.1. This is due to missing nonce validation in the ss_addtoallowlist class. This makes it possible for unauthenticated attackers to add arbitrary email addresses to the spam allowlist via a forged request granted they can trick a site administrator into performing an action such as clicking on a link. The vulnerability was partially patched in version 2026.1.
Problem types
CWE-352 Cross-Site Request Forgery (CSRF)
Product status
* (semver)
Timeline
| 2026-01-27: | Disclosed |
Credits
Stephanie Walters
References
www.wordfence.com/...-a769-422d-ae3f-565cb1cc8a73?source=cve
plugins.trac.wordpress.org/.../classes/ss_addtoallowlist.php
plugins.trac.wordpress.org/changeset/3436357/
plugins.trac.wordpress.org/changeset/3440788/