CVE-2026-109198
highpriority · track · 29EPSS 0.004 · 32 %ileEPSS · scored 2026-10-27
The Anti-Spam by CleanTalk – Spam Protection Without CAPTCHA plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'user_email' parameter in all versions up to, and including, 6.89.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Successful exploitation requires user registration to be open on the site, and script execution is triggered when an Administrator subsequently runs the plugin's user-spam scan and views the resulting Non-checkable users or Spam users tab — the plugin's own documented workflow.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.6–7.2
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products
Products and version ranges known to be affected.
No affected products recorded.
sources
Which sources assert this record, and when.
references (6) nvd
External citations — patches, advisories, analysis.
- https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.89.1/inc/cleantalk-public-integrations.php#L882
- https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.89.1/lib/Cleantalk/ApbctWP/FindSpam/ListTable/BadUsers.php#L87
- https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.89.1/lib/Cleantalk/ApbctWP/FindSpam/ListTable/Users.php#L113
- https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.89.1/lib/Cleantalk/ApbctWP/FindSpam/UsersChecker.php#L182
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3747972%40cleantalk-spam-protect&new=3747972%40cleantalk-spam-protect
- https://www.wordfence.com/threat-intel/vulnerabilities/id/93cf8a35-61a4-4998-ae34-86c96898e30f?source=cve
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