CVE-2025-2881: Developer Toolbar Information Disclosure

CVE-2025-2881 Overview

CVE-2025-2881 affects the Developer Toolbar plugin for WordPress in all versions up to and including 1.0.3. The plugin ships with a publicly accessible phpinfo.php script that exposes PHP configuration data without authentication. Unauthenticated attackers can request the script directly and view sensitive server information including PHP version, loaded modules, environment variables, and file system paths. This information disclosure weakness is classified as [CWE-200]. Attackers commonly use phpinfo() output during reconnaissance to identify additional attack surface on WordPress hosts.

Critical Impact
Unauthenticated attackers can retrieve PHP configuration details that assist in planning follow-on attacks against WordPress installations.

Affected Products

WordPress Developer Toolbar plugin versions up to and including 1.0.3
WordPress sites with the plugin installed and activated
Any hosting environment exposing the plugin's phpinfo.php endpoint

Discovery Timeline

2025-04-12 - CVE-2025-2881 published to the National Vulnerability Database
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-2881

Vulnerability Analysis

The Developer Toolbar plugin includes a diagnostic view file located at views/phpinfo.php. The file invokes PHP's built-in phpinfo() function without performing any capability check, nonce validation, or authentication. As a result, any unauthenticated visitor who knows or guesses the file path can trigger a full PHP information dump. The exposed output reveals PHP version, compile options, extension configurations, server environment variables, HTTP headers, and absolute file paths on the host.

Attackers use this data to fingerprint the environment and identify vulnerable PHP versions or extensions. Absolute paths disclosed by phpinfo() enable path traversal attempts and inform local file inclusion payloads. Environment variables occasionally contain database credentials or API tokens injected by hosting providers.

Root Cause

The root cause is a missing access control on a diagnostic script bundled with the plugin. The phpinfo.php file executes independently of the WordPress request lifecycle and does not check current_user_can() or verify a nonce before rendering output. Files placed under wp-content/plugins/ are directly reachable over HTTP by default, so any script inside the plugin folder becomes a public endpoint.

Attack Vector

Exploitation requires only an HTTP GET request to /wp-content/plugins/developer-toolbar/views/phpinfo.php. No authentication, user interaction, or special network position is required. The attack is remotely exploitable and results in a confidentiality impact limited to information disclosure. Integrity and availability of the target are not directly affected by this weakness.

Detection Methods for CVE-2025-2881

Indicators of Compromise

HTTP requests in web server logs targeting /wp-content/plugins/developer-toolbar/views/phpinfo.php
Repeated 200-response accesses to plugin views/ directories from external IP addresses
User-agent strings associated with reconnaissance tools such as wpscan, nuclei, or curl hitting the plugin path

Detection Strategies

Scan installed WordPress plugins for the presence of the Developer Toolbar plugin at version 1.0.3 or earlier
Search web access logs for GET requests containing developer-toolbar/views/phpinfo.php
Use vulnerability scanners with signatures for the Wordfence advisory referenced in this CVE

Monitoring Recommendations

Alert on any HTTP 200 response returned from phpinfo.php paths anywhere under wp-content/
Monitor for post-reconnaissance behavior such as targeted exploitation attempts against disclosed PHP extensions
Correlate access log entries with WAF telemetry to identify scanners enumerating plugin directories

How to Mitigate CVE-2025-2881

Immediate Actions Required

Deactivate and uninstall the Developer Toolbar plugin until a patched version is confirmed available
Block direct HTTP access to phpinfo.php at the web server or WAF layer
Review web server logs for prior access to the vulnerable endpoint and rotate any credentials that may have been exposed through environment variables

Patch Information

No vendor-supplied patched version is referenced in the NVD entry for CVE-2025-2881. Administrators should monitor the WordPress Developer Toolbar Plugin page and the Wordfence Vulnerability Report for update availability. Review the vulnerable code path at the WordPress Developer Toolbar Code reference.

Workarounds

Remove the views/phpinfo.php file from the plugin directory to eliminate the exposed endpoint
Add a web server rule that denies requests to any phpinfo.php file under wp-content/plugins/
Restrict wp-content/plugins/developer-toolbar/ access to trusted IP addresses via .htaccess or Nginx location directives

bash

# Nginx configuration to block access to the vulnerable script
location ~* /wp-content/plugins/developer-toolbar/views/phpinfo\.php$ {
    deny all;
    return 403;
}