Known vulnerabilities in Hummingbird Performance – Cache & Page Speed Optimization for Core Web Vitals | Critical CSS | Minify CSS | Defer CSS Javascript | CDN

Optimize PageSpeed Performance & Core Web Vitals, Advanced Cache, Minify CSS & JavaScript, Inline Critical CSS, Defer CSS & JS, Smush & Lazy Load, CDN

5Reported vulnerabilities

9.8Highest CVSS score

3.20.0Latest version

70,000+Active installs

What to do now

Update Hummingbird Performance – Cache & Page Speed Optimization for Core Web Vitals | Critical CSS | Minify CSS | Defer CSS Javascript | CDN to 3.21.1 or later. 5 of these have a fixed version available. Updating resolves them.

Plugin last updated: July 20, 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-2026-83627	Critical 9.8	0.8%	0 to 3.21.0 (inclusive)	`3.21.1`	September 5, 2026
CVE-2024-43118	High 8.8	0.6%	Before 3.9.2	`3.9.2`	November 1, 2024
CVE-2024-43117	High 8.8	0.2%	Before 3.9.2	`3.9.2`	August 26, 2024
CVE-2025-14437	High 7.5	1.9%	0 to 3.18.0 (inclusive)	`3.18.1`	December 18, 2025
CVE-2024-32792	Medium 5.3	0.3%	Before 3.7.4	`3.7.4`	June 9, 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.