CVE-2025-60156: AR For WordPress CSRF Vulnerability

CVE-2025-60156 Overview

A critical Cross-Site Request Forgery (CSRF) vulnerability has been identified in the AR For WordPress plugin that enables attackers to upload a web shell to a vulnerable web server. This vulnerability allows malicious actors to trick authenticated administrators into performing unauthorized file uploads, potentially leading to complete server compromise.

The vulnerability exists due to missing or improper CSRF token validation in the plugin's file upload functionality. When an authenticated administrator visits a malicious page while logged into their WordPress site, the attacker can exploit this flaw to upload arbitrary files, including PHP web shells, to the target server.

Critical Impact

This vulnerability enables unauthenticated attackers to upload web shells through CSRF attacks, potentially resulting in complete server takeover, data theft, and use of the compromised server for further attacks.

Affected Products

• AR For WordPress plugin versions up to and including 7.98
• WordPress installations with vulnerable AR For WordPress plugin installed
• Web servers hosting affected WordPress sites

Discovery Timeline

• 2025-09-26 - CVE CVE-2025-60156 published to NVD
• 2025-09-26 - Last updated in NVD database

Technical Details for CVE-2025-60156

Vulnerability Analysis

This CSRF vulnerability (CWE-352) allows attackers to bypass the same-origin policy protections that normally prevent cross-site attacks. The AR For WordPress plugin fails to properly validate anti-CSRF tokens when processing file upload requests, enabling attackers to craft malicious requests that appear legitimate to the server.

When exploited, this vulnerability chains CSRF with arbitrary file upload capabilities, creating a severe attack scenario. An attacker can host a malicious webpage containing a hidden form or JavaScript that automatically submits a file upload request to the victim's WordPress site. If an authenticated administrator with sufficient privileges visits this malicious page, their browser will execute the request with their session credentials, bypassing authentication entirely.

The impact is particularly severe because successful exploitation results in web shell deployment. Once a web shell is uploaded, attackers gain persistent remote access to execute arbitrary commands, read sensitive files, modify database contents, and potentially pivot to other systems on the network.

Root Cause

The root cause of this vulnerability is the absence of proper CSRF protection mechanisms in the plugin's file upload handling code. WordPress provides built-in nonce verification functions (wp_nonce_field() and wp_verify_nonce()) that should be implemented in all state-changing operations, particularly sensitive ones like file uploads. The AR For WordPress plugin fails to implement these protections adequately, allowing cross-origin requests to be processed without verification.

Attack Vector

The attack follows a network-based vector requiring user interaction. An attacker must:

1. Identify a WordPress site running the vulnerable AR For WordPress plugin (version 7.98 or earlier)
2. Craft a malicious HTML page containing a form that submits a web shell upload request to the target site
3. Lure an authenticated WordPress administrator to visit the malicious page
4. The administrator's browser automatically submits the upload request with their valid session
5. The server processes the request, uploading the attacker's web shell
6. The attacker accesses the uploaded web shell to execute arbitrary commands

The attack requires no authentication from the attacker's perspective, as the victim's authenticated session is leveraged to perform the malicious action. This scope change allows the attacker to impact resources beyond the vulnerable component's security scope.

Detection Methods for CVE-2025-60156

Indicators of Compromise

• Unexpected PHP files appearing in WordPress upload directories or plugin folders
• Web server access logs showing requests to unfamiliar PHP files with command parameters
• File system modifications in WordPress directories at times inconsistent with administrator activity
• Outbound network connections from the web server to unknown external hosts

Detection Strategies

• Monitor WordPress upload directories for newly created PHP files or files with suspicious extensions
• Implement file integrity monitoring on the WordPress installation to detect unauthorized changes
• Review web server access logs for POST requests to the AR For WordPress plugin endpoints from external referrers
• Deploy Web Application Firewall (WAF) rules to detect and block common web shell patterns

Monitoring Recommendations

• Enable detailed logging on the WordPress installation and web server
• Set up alerts for new file creation events in the wp-content directory structure
• Monitor for unusual process execution patterns from the web server process (e.g., command execution, network connections)
• Regularly audit installed plugins and their file checksums against known-good values

How to Mitigate CVE-2025-60156

Immediate Actions Required

• Immediately disable or remove the AR For WordPress plugin until a patched version is available
• Review the WordPress installation for signs of compromise, particularly unexpected files in upload directories
• Implement server-level file upload restrictions to prevent PHP file uploads where not explicitly required
• Add WAF rules to block suspicious file upload attempts and common web shell signatures

Patch Information

Users should check Patchstack's vulnerability database for the latest patch information and updates from the plugin vendor. Until an official patch is released, it is strongly recommended to deactivate the plugin entirely.

Workarounds

• Deactivate the AR For WordPress plugin through the WordPress admin panel until a security update is available
• Implement additional CSRF protection at the web server or WAF level using custom rules
• Restrict plugin file upload functionality through server configuration (disable PHP execution in upload directories)
• Limit WordPress administrative access to trusted IP addresses only to reduce the attack surface

# Apache configuration to prevent PHP execution in uploads directory
# Add to .htaccess in wp-content/uploads/
<FilesMatch "\.php$">
    Order Allow,Deny
    Deny from all
</FilesMatch>