CVE-2026-77830: Cleantalk Spam Protection, Honeypot, Anti-Spam By Cleantalk

High severity, CVSS 7.2. EPSS: 0.5% chance of exploitation in the next 30 days.

The Spam protection, Honeypot, Anti-Spam by CleanTalk plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Content aria-label Placeholder in all versions up to, and including, 6.86 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with custom-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The payload is deliverable via unauthenticated comment submission and executes exclusively for non-logged-in visitors; if comment moderation is enabled, an approving moderator must first publish the comment before the script reaches other users.

Affected products

• Cleantalk Spam Protection, Honeypot, Anti-Spam By Cleantalk: up to and including 6.86

Published 2026-09-05. Last modified 2026-09-08.