CVE-2023-5239: Cleantalk Security & Malware Scan

High severity, CVSS 7.5. EPSS: 0.7% chance of exploitation in the next 30 days.

The Security & Malware scan by CleanTalk WordPress plugin before 2.121 retrieves client IP addresses from potentially untrusted headers, allowing an attacker to manipulate its value. This may be used to bypass bruteforce protection.

Affected products

• Cleantalk Security & Malware Scan: up to and including 2.121

Published 2023-11-27. Last modified 2026-06-17.