CVE-2025-14437
HighExploitedHummingbird <= 3.18.0 - Unauthenticated Sensitive Information Exposure via Log File
Published Dec 17, 2025 · Updated Oct 1, 2026 · Also known as 8755ab3f-ee77-44ea-8620-590f1f1cb333
Key Facts
Patch immediately- CVE-2025-14437 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting hummingbird-performance (wordpress-plugin), Hummingbird Performance – Cache & Page Speed Optimization for Core Web Vitals | Critical CSS | Minify CSS | Defer CSS Javascript | CDN.
- It is exploited in the wild, listed in Industry KEV feed since Apr 1, 2026. No public exploit code is known.
- EPSS estimates a 1.9% probability of exploitation in the next 30 days.
- Fixed versions are available, including hummingbird-performance 3.18.1.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS (30-day exploit likelihood)
1.9%
Higher than 79.5% of all scored CVEs
Exploited in the wild
Yes
1 catalog listing
Public exploit code
None known
Get the full CVE-2025-14437 brief as a PDF
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Description
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Apr 1, 2026 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
2 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| hummingbird-performancewordpress-plugin | See advisory | 3.18.1 |
| Hummingbird Performance – Cache & Page Speed Optimization for Core Web Vitals | Critical CSS | Minify CSS | Defer CSS Javascript | CDN | See advisory | n/a |
Patched Releases
hummingbird-performance
3.18.1
Timeline
Publicly disclosed
Dec 17, 2025
Added to Industry KEV feed
Apr 1, 2026
Last updated
Oct 1, 2026
Weakness Type
- CWE-532 Insertion of Sensitive Information into Log File
References
- advisoryhttps://www.wordfence.com/threat-intel/vulnerabilities/id/8755ab3f-ee77-44ea-8620-590f1f1cb333?source=api-prod
- advisoryhttps://www.wordfence.com/threat-intel/vulnerabilities/id/8755ab3f-ee77-44ea-8620-590f1f1cb333?source=api-scan
- exploitVulnCheck exploitation report
- otherhttps://plugins.trac.wordpress.org/changeset/3421187/hummingbird-performance
- otherhttps://www.wordfence.com/threat-intel/vulnerabilities/id/8755ab3f-ee77-44ea-8620-590f1f1cb333?source=cve
FAQ
Common Questions.
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.
Affected: hummingbird-performance (wordpress-plugin); Hummingbird Performance – Cache & Page Speed Optimization for Core Web Vitals | Critical CSS | Minify CSS | Defer CSS Javascript | CDN. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Apr 1, 2026.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including hummingbird-performance 3.18.1.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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