CVE-2025-32568: EmpikPlace for WooCommerce RCE Flaw

CVE-2025-32568 Overview

CVE-2025-32568 is a critical insecure deserialization vulnerability affecting the EmpikPlace for WooCommerce WordPress plugin. The vulnerability allows unauthenticated attackers to inject arbitrary PHP objects through deserialization of untrusted data. This type of vulnerability, classified as CWE-502 (Deserialization of Untrusted Data), can lead to severe consequences including remote code execution, unauthorized data access, and complete site compromise when combined with a suitable POP (Property-Oriented Programming) chain.

Critical Impact

Unauthenticated PHP Object Injection vulnerability that can potentially lead to remote code execution, data manipulation, or complete WordPress site takeover through malicious serialized payloads.

Affected Products

• EmpikPlace for WooCommerce plugin versions up to and including 1.4.2
• WordPress installations running the vulnerable plugin versions
• WooCommerce stores integrated with the EmpikPlace marketplace

Discovery Timeline

• April 11, 2025 - CVE-2025-32568 published to NVD
• April 11, 2025 - Last updated in NVD database

Technical Details for CVE-2025-32568

Vulnerability Analysis

This vulnerability stems from improper handling of serialized data within the EmpikPlace for WooCommerce plugin. PHP object injection vulnerabilities occur when user-controllable input is passed directly to PHP's unserialize() function without proper validation. When an attacker supplies a maliciously crafted serialized string, the PHP engine instantiates objects with attacker-controlled properties.

The danger of PHP object injection lies in the automatic invocation of "magic methods" during object lifecycle events. Methods such as __wakeup(), __destruct(), __toString(), and __call() can be triggered automatically, allowing attackers to chain together multiple class methods (POP chains) to achieve arbitrary code execution or other malicious outcomes.

Given the network attack vector with no authentication or user interaction required, this vulnerability presents a significant risk to WordPress sites using the affected plugin.

Root Cause

The root cause is the deserialization of untrusted user input without adequate validation or sanitization. The plugin processes serialized data from an untrusted source, allowing attackers to control the object types and property values that get instantiated. In WordPress environments, numerous classes with exploitable magic methods exist that can be leveraged as gadgets in POP chains to achieve code execution.

Attack Vector

The vulnerability is exploitable remotely over the network. An attacker can craft a malicious serialized PHP payload containing object instantiation instructions. When this payload reaches the vulnerable deserialization point in the plugin, the PHP engine processes it and instantiates objects according to the attacker's specifications.

The attack flow typically involves:

1. Identifying the vulnerable endpoint that accepts serialized data
2. Crafting a serialized payload containing malicious object chains
3. Sending the payload to the vulnerable WordPress installation
4. The server deserializes the payload, triggering magic methods
5. Execution of attacker-controlled code or actions through the POP chain

For detailed technical information about this vulnerability, refer to the Patchstack WordPress Vulnerability Report.

Detection Methods for CVE-2025-32568

Indicators of Compromise

• Unexpected serialized data patterns in HTTP request parameters, POST bodies, or cookies containing PHP object notation (e.g., O:, a:, s: prefixes)
• Unusual process spawning or file system modifications originating from PHP/WordPress processes
• Web server logs showing requests with encoded or obfuscated serialized payloads targeting plugin endpoints
• Creation of unknown files in the WordPress uploads directory or plugin folders

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block serialized PHP object patterns in request parameters
• Monitor WordPress file integrity for unauthorized modifications to core files, plugins, or themes
• Implement logging for all plugin-related API endpoints and analyze for anomalous request patterns
• Use security plugins that can detect and alert on deserialization attempts

Monitoring Recommendations

• Enable verbose logging on WordPress and review logs for suspicious deserialization-related activities
• Monitor server resource usage for unexpected spikes that may indicate exploitation attempts
• Set up alerts for new user account creation or privilege escalation events
• Review database tables for unexpected entries or modifications to serialized option values

How to Mitigate CVE-2025-32568

Immediate Actions Required

• Update the EmpikPlace for WooCommerce plugin to a patched version as soon as one becomes available
• If no patch is available, consider temporarily disabling the plugin until a fix is released
• Implement WAF rules to filter requests containing suspicious serialized data patterns
• Review server logs for any signs of exploitation attempts

Patch Information

At the time of publication, site administrators should monitor the Patchstack WordPress Vulnerability Report for updates regarding official patches. Ensure automatic updates are enabled for the plugin or manually check for updates regularly.

Workarounds

• Temporarily deactivate and remove the EmpikPlace for WooCommerce plugin if it is not critical to operations
• Implement server-level input validation to reject requests containing serialized PHP object patterns
• Use a security plugin or WAF that can detect and block object injection attempts
• Restrict access to the WordPress admin area and sensitive endpoints to trusted IP addresses only

# Apache .htaccess rule to block common PHP serialization patterns
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{QUERY_STRING} (O:\d+:\"[a-zA-Z_]+\":) [NC,OR]
RewriteCond %{REQUEST_BODY} (O:\d+:\"[a-zA-Z_]+\":) [NC]
RewriteRule .* - [F,L]
</IfModule>