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wordfence / plugin · cleantalk-spam-protect
Anti Spam for Contact Forms, Comments & Online Stores – CleanTalk
cleantalk-spam-protect
total installs
200,000
total vulns
1
critical
1
high
0
medium
0
low
0
latest vuln
—
patched
1
unpatched
0
avg time to patch
—
vulnerabilities
(1)
Spam protection, Honeypot, Anti-Spam by CleanTalk <= 6.71 - Authorization Bypass via Reverse DNS (PTR record) Spoofing to Unauthenticated Arbitrary Plugin Installation
critical
✓ patched
cve id
CVE-2026-1490 ↗
cvss score
9.8
cwe
CWE-350: Reliance on Reverse DNS Resolution for a Security-Critical Action
published
Feb 14, 2026
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.