CVE-2025-69002: OneLife Theme Object Injection Flaw

CVE-2025-69002 Overview

A deserialization of untrusted data vulnerability has been identified in the designthemes OneLife WordPress theme that allows PHP Object Injection. This vulnerability affects OneLife theme versions through 3.9 and enables attackers to inject arbitrary PHP objects into the application, potentially leading to remote code execution, data manipulation, or other malicious activities depending on the available gadget chains within the application.

Critical Impact

Attackers can exploit this PHP Object Injection vulnerability to execute arbitrary code, manipulate application data, or escalate privileges by leveraging available gadget chains in the WordPress environment.

Affected Products

• designthemes OneLife WordPress Theme versions through 3.9
• WordPress installations running vulnerable OneLife theme versions

Discovery Timeline

• 2026-01-22 - CVE CVE-2025-69002 published to NVD
• 2026-01-22 - Last updated in NVD database

Technical Details for CVE-2025-69002

Vulnerability Analysis

This vulnerability falls under CWE-502 (Deserialization of Untrusted Data), a critical weakness that occurs when an application deserializes user-controlled data without proper validation. In the context of the OneLife WordPress theme, the application processes serialized PHP data from untrusted sources, allowing attackers to craft malicious serialized payloads that, when deserialized, instantiate arbitrary PHP objects with attacker-controlled properties.

PHP Object Injection vulnerabilities in WordPress themes are particularly dangerous because the WordPress ecosystem contains numerous classes with "magic methods" (such as __wakeup(), __destruct(), __toString()) that can be chained together to achieve various malicious outcomes. When a malicious serialized object is deserialized, these magic methods are automatically invoked, potentially triggering a chain of operations that leads to remote code execution.

Root Cause

The root cause of this vulnerability lies in the OneLife theme's improper handling of serialized data. The theme accepts and deserializes user-supplied input without adequate validation or sanitization, trusting the integrity of the serialized data. This design flaw allows attackers to craft specially formatted serialized strings that, when processed by PHP's unserialize() function, create objects with malicious property values.

The lack of input validation combined with the absence of type checking or allowlisting of permissible classes during deserialization creates the conditions for this vulnerability to be exploited.

Attack Vector

The attack vector involves an attacker crafting a malicious serialized PHP object payload and submitting it to the vulnerable endpoint in the OneLife theme. The exploitation process typically follows these steps:

1. The attacker identifies an entry point in the OneLife theme that accepts serialized data
2. The attacker analyzes available PHP classes in the WordPress installation to identify useful gadget chains
3. A malicious serialized payload is crafted containing objects that, when deserialized, trigger a chain of method calls
4. The payload is submitted to the vulnerable endpoint
5. The application deserializes the malicious data, instantiating the crafted objects
6. Magic methods are automatically invoked, executing the attack chain

The specific impact depends on the available gadget chains within the WordPress installation and its plugins, but could range from file operations to remote code execution.

Detection Methods for CVE-2025-69002

Indicators of Compromise

• Unusual serialized data patterns in HTTP request parameters or POST bodies, particularly containing PHP class names
• Unexpected file system changes or new files created in WordPress directories
• Suspicious PHP error logs indicating deserialization failures or class instantiation errors
• Anomalous database queries or modifications not associated with normal user activity

Detection Strategies

• Monitor web application firewall (WAF) logs for requests containing serialized PHP object patterns (strings beginning with O:, a:, s:)
• Implement input validation rules to detect and block serialized PHP data in unexpected request parameters
• Deploy file integrity monitoring on WordPress theme directories to detect unauthorized modifications
• Review application logs for PHP notices or warnings related to unserialize() operations

Monitoring Recommendations

• Enable comprehensive logging for the OneLife theme and monitor for unusual deserialization activity
• Configure SentinelOne Singularity to monitor WordPress processes for suspicious behavior patterns indicative of object injection exploitation
• Set up alerting for any new PHP file creation or modification within the WordPress installation directory
• Monitor outbound network connections from the web server for potential command and control communication

How to Mitigate CVE-2025-69002

Immediate Actions Required

• Update the OneLife WordPress theme to a patched version when available from designthemes
• Implement a Web Application Firewall (WAF) rule to block requests containing serialized PHP object patterns
• Audit all user input entry points in the theme and implement strict input validation
• Consider temporarily disabling or replacing the OneLife theme with a secure alternative until a patch is available

Patch Information

Users should monitor the Patchstack Vulnerability Report for updates on patch availability. Contact designthemes for information on security updates addressing this vulnerability.

When a patch becomes available, update the OneLife theme through the WordPress admin dashboard or by manually replacing theme files. Ensure backups are taken before applying any updates.

Workarounds

• Implement server-side input validation to reject any input containing serialized PHP data patterns
• Deploy a WAF with rules specifically designed to detect and block PHP object injection attempts
• If the vulnerable functionality can be identified, disable it through theme customization or a security plugin
• Consider using PHP's allowed_classes parameter in unserialize() calls if modifying theme code directly (set to false or an empty array to prevent object instantiation)