CVE-2024-25095: Easy Forms For Mailchimp Log Vulnerability

CVE-2024-25095 Overview

CVE-2024-25095 is an information disclosure vulnerability in the Code Parrots Easy Forms for Mailchimp plugin for WordPress. The plugin writes sensitive information into log files that may be retrievable by unauthenticated remote attackers. The flaw is classified under [CWE-532]: Insertion of Sensitive Information into Log File. All plugin versions from initial release through 6.9.0 are affected. The vulnerability requires no authentication, no user interaction, and is exploitable over the network.

Critical Impact
Unauthenticated attackers can read log files containing sensitive data from affected WordPress sites running Easy Forms for Mailchimp versions up to and including 6.9.0.

Affected Products

Code Parrots Easy Forms for Mailchimp (WordPress plugin)
All versions from initial release through 6.9.0
WordPress sites with the plugin installed and active

Discovery Timeline

2024-06-04 - CVE-2024-25095 published to NVD
2024-11-21 - Last updated in NVD database

Technical Details for CVE-2024-25095

Vulnerability Analysis

The Easy Forms for Mailchimp plugin records operational data into log files during normal form submission and integration workflows. The logging routine includes sensitive information that should not be written to disk in cleartext. The log files are stored in locations reachable by unauthenticated requests, allowing remote attackers to harvest the recorded data.

The issue is a classic [CWE-532] weakness where defensive logging exposes data the application is otherwise designed to protect. Attackers do not need credentials or user interaction to retrieve the exposed information. Confidentiality is the primary security property impacted, while integrity and availability are unaffected.

Root Cause

The root cause is the plugin's logging implementation, which writes sensitive request and integration data to files without filtering or sanitization. The log files reside within the plugin directory structure and lack access controls such as .htaccess restrictions, deny rules, or randomized filenames. This combination of overly verbose logging and predictable, web-accessible storage paths enables remote retrieval.

Attack Vector

An unauthenticated attacker sends HTTP requests to the WordPress site to fetch the plugin's log files directly. Once retrieved, the logs can be parsed for subscriber data, API tokens, internal identifiers, or other sensitive content captured during form processing. The attack requires only knowledge of the plugin path and log filename conventions, both of which are documented or guessable.

No public proof-of-concept exploit is currently available, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. Technical details are documented in the Patchstack Vulnerability Analysis.

Detection Methods for CVE-2024-25095

Indicators of Compromise

Unauthenticated HTTP GET requests targeting paths under /wp-content/plugins/yikes-inc-easy-mailchimp-extender/ referencing .log or .txt files
Repeated access attempts to plugin subdirectories from a single source IP or user agent
Outbound enumeration of WordPress plugin directories preceding log file requests

Detection Strategies

Inspect web server access logs for direct requests to the Easy Forms for Mailchimp plugin directory, particularly file extensions associated with log storage
Alert on HTTP 200 responses returning text content from plugin subdirectories that should not be world-readable
Correlate plugin enumeration scans with subsequent file retrieval to identify reconnaissance leading to data exfiltration

Monitoring Recommendations

Monitor file system access on the WordPress host for unusual reads of files within the plugin directory
Track outbound data volume from the WordPress server to detect bulk log exfiltration
Audit installed WordPress plugins and versions to identify exposed Easy Forms for Mailchimp instances

How to Mitigate CVE-2024-25095

Immediate Actions Required

Update Easy Forms for Mailchimp to a version later than 6.9.0 if a fixed release is available from the vendor
Delete existing log files within the plugin directory after confirming they are not needed for forensic review
Restrict web access to the plugin directory using web server configuration rules
Rotate any API keys, tokens, or credentials that may have been recorded in the exposed logs

Patch Information

The vulnerability affects Easy Forms for Mailchimp up to and including version 6.9.0. Site administrators should consult the Patchstack Vulnerability Analysis and the plugin's official WordPress repository for the latest fixed version and apply it immediately.

Workarounds

Add web server rules to block direct HTTP access to .log files within /wp-content/plugins/yikes-inc-easy-mailchimp-extender/
Disable or uninstall the plugin until a patched version is deployed if logs cannot be secured
Deploy a web application firewall rule that denies external requests for files with logging extensions inside the plugin path

bash

# Apache configuration example to block log file access
<FilesMatch "\.(log|txt)$">
    Require all denied
</FilesMatch>

# Nginx equivalent
location ~* /wp-content/plugins/yikes-inc-easy-mailchimp-extender/.*\.(log|txt)$ {
    deny all;
    return 403;
}