The Hummingbird Performance plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 3.18.0 via the 'request' function. This makes it possible for unauthenticated attackers to extract sensitive data including Cloudflare API credentials.
CVE-2025-14437 is a high severity with CVSS 7.5 Sensitive Information Exposure issue affecting the Plugin Hummingbird Performance – Cache & Page Speed Optimization for Core Web Vitals | Critical CSS | Minify CSS | Defer CSS Javascript | CDN. It affects Versions up to 3.18.0 and is fixed in 3.18.1.
CVE-2025-14437 is tracked for the Plugin Hummingbird Performance – Cache & Page Speed Optimization for Core Web Vitals | Critical CSS | Minify CSS | Defer CSS Javascript | CDN as high severity with CVSS 7.5. The affected range is Versions up to 3.18.0. Update Hummingbird Performance – Cache & Page Speed Optimization for Core Web Vitals | Critical CSS | Minify CSS | Defer CSS Javascript | CDN to 3.18.1 or newer where that version is compatible with the site.
| Software Type | Plugin |
|---|---|
| Software Slug |
hummingbird-performance
View on wordpress.org
|
| CVE | CVE-2025-14437 |
| Patched Versions |
3.18.1
|
| Affected Versions |
Versions up to 3.18.0
|
These internal links group the same WordPress plugin by CVE, issue type, severity, and patch status so operators and search engines can connect the full vulnerability cluster.
Hummingbird <= 3.3.1 - Admin+ Stored Cross-Site Scripting
Hummingbird <= 3.7.3 - Missing Authorization
Hummingbird <= 3.4.1 - Unauthenticated Path Traversal
Hummingbird <= 3.9.1 - Cross-Site Request Forgery
Hummingbird <= 3.9.1 - Missing Authorization
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