High 7.2Published Oct 23, 2026

CVE-2026-109198Anti-Spam by CleanTalk <= 6.89.1 - Unauthenticated Stored Cross-Site Scripting via 'user_email' Registration Parameter

Updated under an hour ago (Oct 28, 2026, 3:00 AM ET)

Does this affect you?

It affects CleanTalk Anti-Spam – Complete Spam Protection. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.38%, higher than 32% of scored CVEs.

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Every CVE for CleanTalk Anti-Spam – Complete Spam Protection

Exploited in the last 30 days

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: 7.2 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.38% (percentile 32)
Assigned by: Wordfence
NVD analysis: Deferred
Record last updated: Oct 23, 2026
First seen by InfoSec Signals: Oct 23, 2026

Affected products

Affected products

cleantalk CleanTalk Anti-Spam – Complete Spam Protection cleantalk:anti_spam_complete_spam_protection (from the name)	through 6.89.1	CNA record

References

References

https://www.wordfence.com/threat-intel/vulnerabilities/id/93cf8a35-61a4-4998-ae34-86c96898e30f?source=cve
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/browser/cleantalk-spam-protect/tags/6.89.1/inc/cleantalk-public-integrations.php#L882
https://plugins.trac.wordpress.org/changeset?reponame=&old=3747972%40cleantalk-spam-protect&new=3747972%40cleantalk-spam-protect

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.