# CVE-2026-1490

## Summary

- **CVE ID:** CVE-2026-1490
- **Severity:** CRITICAL
- **CVSS Score:** 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** CWE-350
- **Published:** Feb 15, 2026
- **Last Modified:** Apr 9, 2026

## 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 Products

- cleantalk — Spam protection, Honeypot, Anti-Spam by CleanTalk (*)
- cleantalk — Spam protection, Honeypot, Anti-Spam by CleanTalk (0)

## References

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

## Exploitation Prediction (EPSS)

- **EPSS Score:** 1.16%
- **EPSS Percentile:** 65.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._