What is CVE-2026-1490?

CVE-2026-1490 is a critical-severity vulnerability in Cleantalk Spam Protection, Honeypot, Anti-Spam By, classified under CWE-350. CVSS score: 9.8/10. Published 2026-02-15.

How severe is CVE-2026-1490?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Cleantalk Spam Protection, Honeypot, Anti-Spam By

CVE-2026-1490

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.

EPSS: 0.012 (64.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Cleantalk Spam Protection, Honeypot, Anti-spam By — versions 0

Weakness classification (CWE)

CWE-350

References

Frequently asked questions

What is CVE-2026-1490?: CVE-2026-1490 is a critical-severity vulnerability in Cleantalk Spam Protection, Honeypot, Anti-Spam By, classified under CWE-350. CVSS score: 9.8/10. Published 2026-02-15.
How severe is CVE-2026-1490?: Critical severity. CVSS v3 base score is 9.8 out of 10.