CVE-2025-14437

Hummingbird <= 3.18.0 - Unauthenticated Sensitive Information Exposure via Log File

2025-12-17 23:41

Strategic Overview

Status: Patched in 3.18.1
Affected Plugin: Hummingbird Performance – Cache & Page Speed Optimization for Core Web Vitals | Critical CSS | Minify CSS | Defer CSS Javascript | CDN
Affected Version: <= 3.18.0
CVSS: 7.5High
Weakness type: CWE-532 · Insertion of Sensitive Information into Log File
CVE: CVE-2025-14437

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

At a glance

CVE-2025-14437 is a high-severity Insertion of Sensitive Information into Log File vulnerability in the Hummingbird Performance WordPress plugin, affecting versions <= 3.18.0. It carries a CVSS score of 7.5 (reachable over the network; low attack complexity; high confidentiality impact). Exploitation requires no authentication. The issue is fixed in version 3.18.1; sites on affected versions should update now. Disclosed December 2025, reported by ISMAILSHADOW.

Vulnerability Overview

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.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user. A successful exploit has high impact on confidentiality.

CWE-532: Insertion of Sensitive Information into Log File

The product writes sensitive information to a log file.

Remediation

Update to version 3.18.1, or a newer patched version

How does WordSec protect against this?

This one needs no account at all, which puts it outside what login hardening can reach; WordSec's login security narrows the account-level paths around it, and the firewall is what inspects the request itself. None of that substitutes for the fix: Hummingbird Performance 3.18.1 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2025-14437 https://www.wordfence.com/threat-intel/vulnerabilities/id/8755ab3f-ee77-44ea-8620-590f1f1cb333 https://nvd.nist.gov/vuln/detail/CVE-2025-14437

Related records

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

CVSS Vector

7.5

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityNone

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