CVE-2025-25088: WP Keyword Monitor CSRF Vulnerability

CVE-2025-25088 Overview

CVE-2025-25088 is a Cross-Site Request Forgery (CSRF) vulnerability affecting the WP Keyword Monitor plugin (wp-keyword-monitor) for WordPress, developed by blackus3r. The flaw exists in all plugin versions from initial release through 1.0.5. According to the Patchstack advisory, the CSRF condition chains into stored Cross-Site Scripting (XSS), allowing attackers to persist malicious script payloads through authenticated victim sessions. Exploitation requires a logged-in WordPress user to interact with attacker-controlled content, such as a malicious link or page. The vulnerability is tracked under CWE-352 (Cross-Site Request Forgery).

Critical Impact

Successful exploitation lets remote attackers perform state-changing actions on behalf of authenticated WordPress users and inject stored XSS payloads, leading to session compromise and potential site takeover.

Affected Products

• WP Keyword Monitor plugin (wp-keyword-monitor) versions up to and including 1.0.5
• WordPress sites running the vulnerable plugin in any configuration
• Administrator and editor accounts authenticated to affected WordPress installations

Discovery Timeline

• 2025-02-07 - CVE-2025-25088 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-25088

Vulnerability Analysis

The vulnerability stems from missing or improperly validated anti-CSRF tokens on state-changing requests handled by the WP Keyword Monitor plugin. WordPress provides the wp_nonce_field() and check_admin_referer() primitives specifically to defend against this attack class. The affected plugin code path does not enforce nonce validation before processing input that is later rendered in the administrative interface.

Because the CSRF flaw chains into stored XSS, attacker-supplied JavaScript persists in the plugin's data store. The script then executes in the browser context of any subsequent administrator viewing the affected page. This converts a single victim click into persistent malicious code execution within the WordPress dashboard.

Root Cause

The root cause is a missing CSRF protection mechanism on plugin endpoints that accept user input. The plugin fails to verify request origin via nonce tokens before writing data, and additionally fails to sanitize that data on output. The combination satisfies both CWE-352 and a secondary stored XSS condition.

Attack Vector

An attacker crafts a malicious HTML page or email containing a forged request targeting the WP Keyword Monitor plugin endpoint. When an authenticated WordPress administrator visits the attacker-controlled resource, the browser automatically submits the request with valid session cookies. The plugin processes the forged request and stores the attacker's payload, which executes when any administrator views the affected admin page.

The vulnerability mechanism is described in the Patchstack WP Keyword Monitor Vulnerability advisory. No public proof-of-concept code is currently available.

Detection Methods for CVE-2025-25088

Indicators of Compromise

• Unexpected <script>, <iframe>, or event-handler attributes stored in WP Keyword Monitor plugin database tables or options
• Administrator sessions exhibiting unauthorized actions such as user creation, plugin installation, or option changes
• Outbound HTTP requests from administrator browsers to unfamiliar domains shortly after viewing the plugin's admin pages
• Web server access logs showing cross-origin Referer headers on POST requests to plugin endpoints

Detection Strategies

• Inspect the WordPress wp_options table and plugin-specific tables for HTML or JavaScript content in fields that should hold plain text keywords
• Monitor WordPress audit logs for state-changing administrative actions that lack a corresponding human-initiated workflow
• Correlate browser telemetry on administrator workstations with WordPress admin URL access patterns to identify forced request submissions

Monitoring Recommendations

• Enable a Web Application Firewall (WAF) rule set that inspects POST requests to wp-admin/admin.php for missing or invalid nonce parameters
• Forward WordPress access logs and PHP error logs to a centralized log platform for anomaly analysis
• Alert on new or modified plugin option values containing HTML tags or JavaScript protocol handlers

How to Mitigate CVE-2025-25088

Immediate Actions Required

• Deactivate the WP Keyword Monitor plugin until a patched version is released by the vendor
• Audit administrator accounts and rotate credentials for any account that may have viewed affected admin pages
• Review the WordPress database for injected script content and remove any malicious payloads
• Restrict access to /wp-admin/ by IP allowlist where operationally feasible

Patch Information

No fixed version is identified in the current advisory data. The vulnerability affects versions up to and including 1.0.5. Site operators should monitor the Patchstack advisory and the WordPress plugin repository for an updated release.

Workarounds

• Remove the WP Keyword Monitor plugin entirely if a vendor patch is not available
• Deploy a WordPress security plugin that enforces nonce validation and sanitizes administrative output
• Configure browser session isolation so administrators do not browse untrusted content while logged into WordPress
• Apply the SameSite=Strict attribute on WordPress authentication cookies to limit cross-origin request inclusion

# Configuration example - disable the vulnerable plugin via WP-CLI
wp plugin deactivate wp-keyword-monitor
wp plugin delete wp-keyword-monitor