CVE-2025-50004: JupiterX Core Object Injection Flaw

CVE-2025-50004 Overview

A Deserialization of Untrusted Data vulnerability has been identified in the artbees JupiterX Core WordPress plugin (jupiterx-core). This security flaw allows attackers to perform PHP Object Injection attacks, potentially leading to remote code execution, privilege escalation, or other severe security impacts depending on the gadget chains available within the WordPress environment.

Critical Impact

PHP Object Injection vulnerabilities in WordPress plugins can be chained with other vulnerable code (gadget chains) to achieve remote code execution, file manipulation, or complete site compromise.

Affected Products

• JupiterX Core plugin for WordPress versions up to and including 4.10.1
• WordPress installations running vulnerable JupiterX Core plugin versions
• Websites using the JupiterX theme ecosystem with the affected core plugin

Discovery Timeline

• 2026-01-22 - CVE CVE-2025-50004 published to NVD
• 2026-01-22 - Last updated in NVD database

Technical Details for CVE-2025-50004

Vulnerability Analysis

This vulnerability falls under CWE-502 (Deserialization of Untrusted Data), a critical class of security flaws that occurs when an application deserializes data from untrusted sources without proper validation. In the context of the JupiterX Core WordPress plugin, the vulnerability manifests as a PHP Object Injection issue.

PHP Object Injection occurs when user-controlled input is passed to PHP's unserialize() function without adequate sanitization. When malicious serialized data is processed, an attacker can instantiate arbitrary PHP objects and invoke their magic methods such as __wakeup(), __destruct(), or __toString(). The actual impact depends on the available classes (gadget chains) within the application and its dependencies.

Root Cause

The root cause of this vulnerability is improper handling of serialized data within the JupiterX Core plugin. The plugin fails to validate or sanitize user-supplied input before passing it to deserialization functions. This allows attackers to craft malicious serialized payloads that, when processed by the application, instantiate objects with attacker-controlled properties.

WordPress environments typically contain numerous classes from the core, themes, and plugins that may serve as gadget chains, significantly increasing the exploitability of such vulnerabilities.

Attack Vector

The attack vector involves submitting specially crafted serialized PHP objects through plugin functionality that processes user input. When the vulnerable code deserializes this malicious input, it can trigger a chain of method calls that lead to various malicious outcomes.

Typical exploitation scenarios include:

1. Crafting a serialized payload containing objects with dangerous magic methods
2. Identifying gadget chains within WordPress core, the JupiterX theme, or other installed plugins
3. Submitting the payload through vulnerable plugin endpoints
4. Achieving code execution, file operations, or database manipulation when the payload is deserialized

For detailed technical information about this vulnerability, refer to the Patchstack security advisory.

Detection Methods for CVE-2025-50004

Indicators of Compromise

• Unusual serialized data patterns in HTTP request parameters, POST bodies, or cookies targeting JupiterX Core plugin endpoints
• Unexpected PHP errors related to object instantiation or deserialization in server logs
• Suspicious file creations or modifications in WordPress directories
• Anomalous database queries or modifications originating from plugin functionality

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block serialized PHP object patterns in incoming requests
• Monitor server access logs for requests containing serialized data signatures (e.g., O: followed by class names)
• Implement file integrity monitoring to detect unauthorized changes to WordPress core, theme, and plugin files
• Review PHP error logs for deserialization-related exceptions or warnings

Monitoring Recommendations

• Enable detailed logging for all WordPress plugin activity, particularly for JupiterX Core functionality
• Configure real-time alerting for suspicious serialized payload patterns in web traffic
• Implement behavioral analysis to detect post-exploitation activities such as webshell deployment or privilege escalation
• Regularly audit installed WordPress plugins and their versions against known vulnerability databases

How to Mitigate CVE-2025-50004

Immediate Actions Required

• Update the JupiterX Core plugin to a version newer than 4.10.1 when a patched version becomes available
• Temporarily disable the JupiterX Core plugin if it is not critical to site functionality
• Implement WAF rules to block requests containing suspicious serialized PHP objects
• Review server logs for any evidence of exploitation attempts
• Audit WordPress user accounts for any unauthorized administrative users that may have been created

Patch Information

Monitor the official JupiterX Core plugin repository and the Patchstack advisory for patch availability. Ensure automatic updates are enabled for WordPress plugins to receive security patches promptly.

Workarounds

• Deploy a Web Application Firewall with rules specifically designed to detect and block PHP object injection attempts
• Restrict access to WordPress admin and plugin functionality to trusted IP addresses only
• Implement the principle of least privilege for WordPress user roles to limit the impact of potential exploitation
• Consider using WordPress security plugins that provide virtual patching capabilities

# Example: Restricting access to wp-admin and plugin directories via .htaccess
# Add to WordPress root .htaccess file
<FilesMatch ".*">
    Order Deny,Allow
    Deny from all
    Allow from 192.168.1.0/24
    Allow from 10.0.0.0/8
</FilesMatch>