Known vulnerabilities in Security Optimizer – The All-In-One Protection Plugin

Secure your WordPress site from brute-force attacks, threats, malware, and bots. Free to use and easy to set up.

4Reported vulnerabilities

5.3Highest CVSS score

1.6.5Latest version

1,000,000+Active installs

What to do now

Update Security Optimizer – The All-In-One Protection Plugin to 1.6.7 or later. 4 of these have a fixed version available. Updating resolves them.

Plugin last updated: July 9, 2026 / Tested up to WordPress: 7.0.4 / View on wordpress.org

Reported vulnerabilities

Ordered by how urgently they need attention — whether a vulnerability is actually being exploited, and how likely exploitation is, rather than CVSS severity alone.

CVE	Severity	Exploit probability next 30 days	Affected versions	Fixed in	Published
CVE-2026-82228	Medium 5.3	0.2%	1.6.6 and earlier	`1.6.7`	August 28, 2026
CVE-2026-13342	Medium 5.3	0.2%	1.5.8 up to (but not including) 1.6.5	`1.6.5`	August 6, 2026
CVE-2025-66121	Medium 5.3	0.3%	1.5.8 and earlier	`1.5.9`	November 30, 2025
CVE-2024-38774	Medium 4.3	0.4%	1.5.0 and earlier	`1.5.1`	July 19, 2024

Sources: vulnerability records from NVD, exploitation from CISA KEV, exploit probability from EPSS. Affected versions come from CPE ranges or from the reporting CNA.