CVE-2026-77830: Spam protection, Honeypot, Anti-Spam by CleanTalk <= 6.86 - Unauthenticated Stored Cross-Site Scripting via Comment Content aria-label Placeholder
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 Software
Event History
Frequently Asked Questions
Who can cause the malicious content to be submitted?
The payload can be delivered through an unauthenticated comment submission. The vulnerability description also identifies authenticated users with custom-level access or higher as able to inject arbitrary scripts.
Who is exposed when an injected comment is viewed?
The script executes exclusively for non-logged-in visitors who access the page containing the injected content. Logged-in visitors are not identified as affected by script execution.
Does comment moderation reduce the immediate risk?
Yes. When comment moderation is enabled, a moderator must approve and publish the malicious comment before the script can reach other visitors.