CVE-2026-77830

Vulnerability Description

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.

CVSS Score

Related Weaknesses (CWE)

References

• https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.84/clea
• https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.84/lib/
• https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.84/lib/
• https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.84/lib/
• https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.85/clea
• https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.85/lib/
• https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.85/lib/
• https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.85/lib/
• https://plugins.trac.wordpress.org/changeset/3677388/cleantalk-spam-protect/trun
• https://plugins.trac.wordpress.org/changeset?old_path=%2Fcleantalk-spam-protect/
• https://plugins.trac.wordpress.org/changeset?reponame=&new=3677388%40cleantalk-s
• https://www.wordfence.com/threat-intel/vulnerabilities/id/10e7000b-597a-4165-860