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CVE-2026-1490

CRITICAL 9.8 CVSS 3.1
Published
February 15, 2026
Last modified
June 17, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-350
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

The Spam protection, Anti-Spam, FireWall by CleanTalk plugin for WordPress is vulnerable to unauthorized Arbitrary Plugin Installation due to an authorization bypass via reverse DNS (PTR record) spoofing on the 'checkWithoutToken' function in all versions up to, and including, 6.71. This makes it possible for unauthenticated attackers to install and activate arbitrary plugins which can be leveraged to achieve remote code execution if another vulnerable plugin is installed and activated. Note: This is only exploitable on sites with an invalid API key.

Affected WordPress components

  • Spam protection, Honeypot, Anti-Spam by CleanTalk Plugin · cleantalk-spam-protect
    Confirmed match Active
    Up to and including 6.71
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • cleantalk Spam protection, Honeypot, Anti-Spam by CleanTalk — Up to and including 6.71

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/trunk/lib/Cleantalk/ApbctWP/RemoteCalls.php#L69
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/trunk/lib/Cleantalk/Common/Helper.php#L64
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset/3454488/cleantalk-spam-protect#file473
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/cb603be6-4a12-49e1-b8cc-b2062eb97f16?source=cve
  • nvd.nist.gov Official NVD record