---
id: CVE-2026-77830
title: >-
  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 sanit…
summary: >-
  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 sanit…
severity: high
cvss: 7.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: cleantalk
product: 'Spam protection, Honeypot, Anti-Spam by CleanTalk'
affected:
  - spam_protection_honeypot_anti-spam_by_cleantalk <= 6.86
published: '2026-09-05'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T15:18:46.693'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-77830'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.84/cleantalk.php#L234
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.84/lib/Cleantalk/ApbctWP/ContactsEncoder/ContactsEncoder.php#L114
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.84/lib/Cleantalk/Common/ContactsEncoder/ContactsEncoder.php#L914
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.84/lib/Cleantalk/Common/ContactsEncoder/ContactsEncoder.php#L933
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.85/cleantalk.php#L234
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.85/lib/Cleantalk/ApbctWP/ContactsEncoder/ContactsEncoder.php#L114
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.85/lib/Cleantalk/Common/ContactsEncoder/ContactsEncoder.php#L914
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.85/lib/Cleantalk/Common/ContactsEncoder/ContactsEncoder.php#L933
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset/3677388/cleantalk-spam-protect/trunk/lib/Cleantalk/Common/ContactsEncoder/ContactsEncoder.php
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset?old_path=%2Fcleantalk-spam-protect/tags/6.86&new_path=%2Fcleantalk-spam-protect/tags/6.87
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset?reponame=&new=3677388%40cleantalk-spam-protect%2Ftags%2F6.87&old=3654120%40cleantalk-spam-protect%2Ftags%2F6.86
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/10e7000b-597a-4165-8604-cb6b29714abb?source=cve
    label: security@wordfence.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-08T14:46:58.387821Z'
epss: 0.00474
epssPercentile: 0.38277
ingestedAt: '2026-09-06T03:49:19.850Z'
---

## Overview

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

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.