CVE-2025-8484: WordPress Code Quality Control Tool Vulnerability

CVE-2025-8484 Overview

CVE-2025-8484 affects the Code Quality Control Tool plugin for WordPress in version 2.1. The plugin writes debug and error data to log files that remain publicly accessible over HTTP. Unauthenticated attackers can request these log files directly and read their contents. The exposed data may include application errors, stack traces, and other operational information useful for reconnaissance.

The vulnerability is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor. It requires no authentication, no user interaction, and can be exploited remotely over the network.

Critical Impact
Unauthenticated remote attackers can read log files containing sensitive application data, aiding follow-on attacks against affected WordPress sites.

Affected Products

Code Quality Control Tool plugin for WordPress, version 2.1
WordPress installations with the plugin installed and active
Sites where the plugin's log files reside under the publicly served web root

Discovery Timeline

2025-10-11 - CVE-2025-8484 published to the National Vulnerability Database (NVD)
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-8484

Vulnerability Analysis

The Code Quality Control Tool plugin writes runtime information to log files stored inside the plugin's directory under the WordPress web root. The plugin does not restrict HTTP access to these files. Any unauthenticated visitor who knows or guesses the log path can retrieve the contents.

The logger implementation is documented in the plugin's error_logger.php source. It appends event data to files served directly by the web server, without an .htaccess deny rule, index file, or authorization check. The Wordfence vulnerability report confirms the disclosure path and impact scope.

Root Cause

The root cause is missing access control on files that store sensitive application state. The plugin stores logs in a web-accessible location and relies on obscurity rather than server configuration or authentication to keep them private. This is a classic information disclosure design flaw tracked as [CWE-200].

Attack Vector

An attacker sends HTTP requests to the plugin's log file paths inside /wp-content/plugins/code-quality-control-tool/. If the web server returns the file, the attacker receives the raw log contents. No credentials, cookies, or session context are required. The information can then be used to identify installed components, active user accounts, file paths, and error conditions that inform later exploitation.

No public proof-of-concept exploit or entry in Exploit-DB has been reported for CVE-2025-8484.

Detection Methods for CVE-2025-8484

Indicators of Compromise

HTTP GET requests to files under /wp-content/plugins/code-quality-control-tool/ with .log or .txt extensions from unauthenticated sources
Repeated 200 OK responses to direct log file requests in web server access logs
Access patterns from scanning tools enumerating plugin directories on WordPress sites

Detection Strategies

Review web server access logs for direct requests to plugin log paths returning successful responses
Search for the code-quality-control-tool string in referer or URI fields across access logs
Correlate anomalous log file downloads with subsequent authentication attempts against the same site

Monitoring Recommendations

Alert on any external HTTP request to files inside /wp-content/plugins/*/ with a .log extension
Track outbound data volumes from WordPress hosts to detect bulk log exfiltration
Monitor for reconnaissance signatures that enumerate WordPress plugin directories

How to Mitigate CVE-2025-8484

Immediate Actions Required

Update the Code Quality Control Tool plugin to a version later than 2.1 that applies the fix from changeset #3385766
If no update is available for your environment, deactivate and remove the plugin from affected WordPress sites
Delete existing log files that may already contain sensitive data
Audit web server access logs for prior unauthorized retrieval of the log files

Patch Information

The plugin author addressed the issue in WordPress plugin changeset #3385766. Site administrators should apply the update through the WordPress plugin manager or by installing the patched release directly.

Workarounds

Add an .htaccess rule in the plugin directory that denies HTTP access to *.log files
Relocate log output to a directory outside the web-accessible document root
Configure the web server to return 403 Forbidden for requests targeting plugin log files
Restrict access to /wp-content/plugins/code-quality-control-tool/ at the WAF or reverse proxy layer

bash

# Apache .htaccess snippet to block direct log file access
<FilesMatch "\.log$">
    Require all denied
</FilesMatch>