Known vulnerabilities in WPSpeed – WordPress Speed, Cache & Performance Optimization (Core Web Vitals, PageSpeed 100)

WordPress speed optimization plugin to boost PageSpeed, improve Core Web Vitals, reduce TTFB and enable static HTML caching for 100/100 performance.

1Reported vulnerabilities

4.3Highest CVSS score

2.6.10Latest version

2,000+Active installs

What to do now

Update WPSpeed – WordPress Speed, Cache & Performance Optimization (Core Web Vitals, PageSpeed 100) to 2.6.6 or later. 1 of these have a fixed version available. Updating resolves them.

Plugin last updated: June 17, 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-2025-47590	Medium 4.3	0.2%	2.6.5 and earlier	`2.6.6`	May 7, 2025

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