CVE-2025-14437: Wpmudev Hummingbird Performance – Cache & Page Speed Optimization For Core Web Vitals | Critical Css | Minify Css | Defer Css JavaScript | Cdn

High severity, CVSS 7.5. EPSS: 1.9% chance of exploitation in the next 30 days.

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.

Affected products

• Wpmudev Hummingbird Performance – Cache & Page Speed Optimization For Core Web Vitals | Critical Css | Minify Css | Defer Css JavaScript | Cdn: up to and including 3.18.0

Published 2025-12-18. Last modified 2026-10-01.