What’s Vulnerable › Vulnerabilities

CVE-2024-10542: Spam protection, Anti-Spam, FireWall by CleanTalk <= 6.43.2 - Authorization Bypass via Reverse DNS Spoofing to Unauthenticated Arbitrary Plugin Installation

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 15.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-11-26 · updated 2026-06-17
• Weakness: CWE-862

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 spoofing on the checkWithoutToken function in all versions up to, and including, 6.43.2. 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.

Affected products

• Drupal Anti-Spam by CleanTalk: before 6.44 — fixed in 6.44

How to fix

Upgrade to a fixed version: Drupal Anti-Spam by CleanTalk 6.44. Check the vendor advisory for mitigations.

References

• https://plugins.trac.wordpress.org/browser/cleantalk-spam-protect/tags/6.43.2/lib/Cleantalk/ApbctWP/RemoteCalls.php#L41
• https://plugins.trac.wordpress.org/changeset/3179819/cleantalk-spam-protect#file631
• https://www.wordfence.com/threat-intel/vulnerabilities/id/d7eb5fad-bb62-4f0b-ad52-b16c3e442b62?source=cve

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