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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
webguyio Stop Spammers Classic
Default version status: unaffected
0 to ≤ 2026.1affected
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/5d6f38d7-a769-422d-ae3f-565cb1cc8a73?source=cve ↗
- https://plugins.trac.wordpress.org/browser/stop-spammer-registrations-plugin/tags/2025.4/classes/ss_addtoallowlist.php#L21 ↗
- https://plugins.trac.wordpress.org/changeset/3436357/ ↗
- https://plugins.trac.wordpress.org/changeset/3440788/ ↗