Critical 9.8Published Feb 14, 2026

CVE-2026-1490Spam protection, Honeypot, Anti-Spam by CleanTalk <= 6.71 - Authorization Bypass via Reverse DNS (PTR record) Spoofing to Unauthenticated Arbitrary Plugin Installation

Updated under an hour ago (Oct 27, 2026, 12:10 AM ET)

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It affects cleantalk Spam protection, Honeypot, Anti-Spam by CleanTalk. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for cleantalk Spam protection, Honeypot, Anti-Spam by CleanTalk

Exploited in the last 30 days

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.

CVSS: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-350
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Wordfence
NVD analysis: Deferred
Record last updated: Apr 8, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

cleantalk Spam protection, Honeypot, Anti-Spam by CleanTalk cleantalk:spam_protection_honeypot_anti_spam_by_cleantalk (from the name)	through 6.71	CNA record

References

References

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

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.