CVE-2025-39548: Right Click Disable CSRF Vulnerability

CVE-2025-39548 Overview

A Cross-Site Request Forgery (CSRF) vulnerability exists in the WordPress "Right Click Disable OR Ban" plugin developed by A WP Life. This vulnerability allows attackers to chain CSRF with Stored Cross-Site Scripting (XSS), enabling malicious actors to execute arbitrary JavaScript code in the context of authenticated users' sessions. The vulnerability affects all versions of the plugin up to and including version 1.1.17.

Critical Impact

Attackers can leverage this CSRF-to-Stored-XSS chain to perform unauthorized actions on behalf of WordPress administrators, potentially leading to complete site compromise, data theft, or malware injection.

Affected Products

• Right Click Disable OR Ban plugin versions up to and including 1.1.17
• WordPress installations using vulnerable plugin versions
• Sites with administrative users accessing attacker-crafted pages

Discovery Timeline

• 2025-04-16 - CVE-2025-39548 published to NVD
• 2026-04-15 - Last updated in NVD database

Technical Details for CVE-2025-39548

Vulnerability Analysis

This vulnerability combines two distinct attack vectors: Cross-Site Request Forgery (CSRF) and Stored Cross-Site Scripting (XSS). The plugin fails to implement proper CSRF protection mechanisms (nonce verification) on sensitive administrative functions, allowing attackers to craft malicious requests that administrators unknowingly execute when visiting attacker-controlled pages.

The CSRF vulnerability serves as the entry point, enabling attackers to inject malicious JavaScript payloads into the plugin's settings. Once stored, these XSS payloads execute whenever users interact with pages where the plugin is active, creating a persistent attack vector that can affect all site visitors and administrators.

Root Cause

The root cause stems from two security weaknesses in the plugin's implementation:

1. Missing CSRF Protection: The plugin does not verify WordPress nonces on administrative form submissions, allowing state-changing requests to be initiated from external origins without proper authorization validation.

2. Insufficient Input Sanitization: User-supplied input stored in plugin settings is not adequately sanitized or escaped before being rendered in the browser, enabling the injection of malicious script content.

These combined weaknesses create a vulnerability chain where attackers can bypass the Same-Origin Policy restrictions by tricking authenticated administrators into submitting malicious configuration changes.

Attack Vector

The attack follows a multi-stage exploitation pattern:

1. Reconnaissance: The attacker identifies a WordPress site running the vulnerable Right Click Disable OR Ban plugin version 1.1.17 or earlier.

2. Payload Crafting: The attacker creates a malicious HTML page containing a hidden form that submits XSS payloads to the plugin's settings endpoint.

3. Social Engineering: The attacker tricks a WordPress administrator into visiting the malicious page while authenticated to their WordPress site.

4. CSRF Exploitation: When the administrator visits the attacker's page, the hidden form automatically submits, storing the XSS payload in the plugin's configuration.

5. XSS Execution: The stored malicious script executes whenever users visit pages where the plugin is active, potentially stealing session cookies, redirecting users, or performing administrative actions.

For detailed technical analysis, refer to the Patchstack Vulnerability Report.

Detection Methods for CVE-2025-39548

Indicators of Compromise

• Unexpected changes to the Right Click Disable OR Ban plugin settings
• Presence of <script> tags or JavaScript event handlers in plugin configuration fields
• Unusual outbound requests from the WordPress admin panel to unknown external domains
• Browser console errors indicating blocked or executed inline scripts on protected pages

Detection Strategies

• Review WordPress plugin settings for unauthorized modifications, particularly in the Right Click Disable OR Ban configuration
• Monitor HTTP POST requests to /wp-admin/options-general.php or plugin-specific endpoints for suspicious patterns
• Implement Content Security Policy (CSP) headers to detect and prevent unauthorized script execution
• Deploy Web Application Firewall (WAF) rules to detect CSRF attack patterns and XSS payloads

Monitoring Recommendations

• Enable WordPress audit logging to track all administrative configuration changes
• Monitor for new administrator accounts or privilege escalation events
• Implement real-time alerting for changes to plugin settings from unusual IP addresses or user agents
• Review server access logs for POST requests to plugin endpoints without valid referer headers

How to Mitigate CVE-2025-39548

Immediate Actions Required

• Update the Right Click Disable OR Ban plugin to a patched version as soon as one becomes available
• Review current plugin settings for any signs of injected malicious content
• Consider temporarily deactivating the plugin until a security patch is released
• Audit administrator accounts for any unauthorized access or privilege changes

Patch Information

Users should monitor the official WordPress plugin repository and the Patchstack vulnerability database for patch announcements. Upgrade to a version newer than 1.1.17 when available.

Workarounds

• Deactivate the Right Click Disable OR Ban plugin until a security update is available
• Implement additional CSRF protection at the web server level using security headers
• Restrict WordPress admin panel access to trusted IP addresses only
• Use a Web Application Firewall (WAF) with rules to block CSRF and XSS attack patterns

# Example: Restrict WordPress admin access by IP in .htaccess
<Files "wp-login.php">
    Order Deny,Allow
    Deny from all
    Allow from 192.168.1.100
    Allow from 10.0.0.0/24
</Files>

# Add security headers to wp-admin
<IfModule mod_headers.c>
    Header set X-Content-Type-Options "nosniff"
    Header set X-Frame-Options "SAMEORIGIN"
    Header set X-XSS-Protection "1; mode=block"
</IfModule>