CVE-2025-39556: Mediavine Control Panel Info Disclosure

CVE-2025-39556 Overview

CVE-2025-39556 is a sensitive data exposure vulnerability in the Mediavine Control Panel WordPress plugin. The flaw affects all versions up to and including 2.10.6. It is categorized under [CWE-497] as Exposure of Sensitive System Information to an Unauthorized Control Sphere. Unauthenticated attackers can retrieve embedded sensitive data over the network without user interaction. The issue was published to the National Vulnerability Database (NVD) on April 16, 2025.

Critical Impact
Remote, unauthenticated attackers can retrieve embedded sensitive information from WordPress sites running the Mediavine Control Panel plugin, potentially exposing configuration data useful for further attacks.

Affected Products

Mediavine Control Panel plugin for WordPress
All versions from n/a through 2.10.6
WordPress sites using the mediavine-control-panel plugin

Discovery Timeline

2025-04-16 - CVE-2025-39556 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-39556

Vulnerability Analysis

The Mediavine Control Panel plugin exposes sensitive system information to unauthorized parties. The vulnerability falls under [CWE-497], which addresses the disclosure of internal state data to actors outside the intended control sphere. An attacker interacting with the plugin over the network can retrieve embedded sensitive data without authentication or user interaction.

The impact is limited to confidentiality — integrity and availability are not affected. Exposed data may include configuration details, internal identifiers, or other information that assists attackers in reconnaissance and follow-on exploitation of the WordPress environment.

Root Cause

The plugin embeds sensitive information within responses or resources accessible without proper access control checks. The plugin does not restrict access to data that should remain within a trusted control sphere. This design flaw persists through version 2.10.6.

Attack Vector

An unauthenticated remote attacker sends network requests to a vulnerable WordPress site running the plugin. The attacker retrieves embedded sensitive data from responses served by the plugin. No privileges or user interaction are required. See the Patchstack Vulnerability Report for additional technical details.

Detection Methods for CVE-2025-39556

Indicators of Compromise

Unusual anonymous HTTP requests to endpoints or resources provided by the mediavine-control-panel plugin
Repeated automated scans against /wp-content/plugins/mediavine-control-panel/ paths
Unauthenticated access to plugin-exposed configuration or metadata responses

Detection Strategies

Audit WordPress installations for the mediavine-control-panel plugin at version 2.10.6 or earlier
Review web server access logs for unauthenticated requests targeting plugin endpoints
Use WordPress vulnerability scanners such as WPScan to identify vulnerable plugin versions

Monitoring Recommendations

Monitor HTTP response payloads from plugin endpoints for embedded sensitive strings
Alert on spikes in anonymous traffic to plugin resource paths
Track user agent patterns commonly associated with WordPress plugin enumeration tools

How to Mitigate CVE-2025-39556

Immediate Actions Required

Identify all WordPress installations running the Mediavine Control Panel plugin
Update the plugin to a version later than 2.10.6 once a fixed release is available from the vendor
Review the Patchstack advisory for the latest remediation guidance

Patch Information

Refer to the vendor and the Patchstack Vulnerability Report for the fixed version. Apply the patched release across all affected WordPress sites.

Workarounds

Disable or remove the mediavine-control-panel plugin until a patched version is applied
Restrict access to plugin endpoints via a Web Application Firewall (WAF) rule blocking unauthenticated requests
Rotate any credentials, API keys, or tokens that may have been embedded in plugin responses