CVE-2026-77830

Spam protection, Honeypot, Anti-Spam by CleanTalk <= 6.86 - Unauthenticated Stored Cross-Site Scripting via Comment Content aria-label Placeholder

Published Sep 5, 2026 CVSS 3.1 · 7.2 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
References
Link Providers
https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.84/cleantalk.php#L234 cve-icon cve-icon
https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.84/lib/Cleantalk/ApbctWP/ContactsEncoder/ContactsEncoder.php#L114 cve-icon cve-icon
https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.84/lib/Cleantalk/Common/ContactsEncoder/ContactsEncoder.php#L914 cve-icon cve-icon
https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.84/lib/Cleantalk/Common/ContactsEncoder/ContactsEncoder.php#L933 cve-icon cve-icon
https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.85/cleantalk.php#L234 cve-icon cve-icon
https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.85/lib/Cleantalk/ApbctWP/ContactsEncoder/ContactsEncoder.php#L114 cve-icon cve-icon
https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.85/lib/Cleantalk/Common/ContactsEncoder/ContactsEncoder.php#L914 cve-icon cve-icon
https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.85/lib/Cleantalk/Common/ContactsEncoder/ContactsEncoder.php#L933 cve-icon cve-icon
https://plugins.trac.wordpress.org/changeset/3677388/cleantalk-spam-protect/trunk/lib/Cleantalk/Common/ContactsEncoder/ContactsEncoder.php cve-icon cve-icon
https://plugins.trac.wordpress.org/changeset?old_path=%2Fcleantalk-spam-protect/tags/6.86&new_path=%2Fcleantalk-spam-protect/tags/6.87 cve-icon cve-icon
https://plugins.trac.wordpress.org/changeset?reponame=&new=3677388%40cleantalk-spam-protect%2Ftags%2F6.87&old=3654120%40cleantalk-spam-protect%2Ftags%2F6.86 cve-icon cve-icon
https://www.wordfence.com/threat-intel/vulnerabilities/id/10e7000b-597a-4165-8604-cb6b29714abb?source=cve cve-icon cve-icon
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Cleantalk
Cleantalk spam Protection, Honeypot, Anti-spam By Cleantalk
Wordpress
Wordpress wordpress
Vendors & Products Cleantalk
Cleantalk spam Protection, Honeypot, Anti-spam By Cleantalk
Wordpress
Wordpress wordpress
Type Values Removed Values Added
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.
Title Spam protection, Honeypot, Anti-Spam by CleanTalk <= 6.86 - Unauthenticated Stored Cross-Site Scripting via Comment Content aria-label Placeholder
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Wordfence
Published
Updated
Sep 8, 2026, 2:47 PM
Reserved
Aug 21, 2026, 2:54 PM
Status
Deferred
Published
Sep 5, 2026, 7:17 AM
Modified
Sep 8, 2026, 3:18 PM