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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:NWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| webguyio | Stop Spammers Classic | <= 2026.1 |
References
- 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/
- https://www.wordfence.com/threat-intel/vulnerabilities/id/5d6f38d7-a769-422d-ae3f-565cb1cc8a73?source=cve
Timeline
- Published
- Jan 28, 2026
- Last modified
- Jun 17, 2026
- NVD status
- Deferred