CVE-2025-69294: PeakShops Object Injection Vulnerability

CVE-2025-69294 Overview

A Deserialization of Untrusted Data vulnerability has been identified in the fuelthemes PeakShops WordPress theme. This security flaw allows attackers to perform Object Injection attacks by exploiting improper handling of serialized data. The vulnerability affects PeakShops theme versions through 1.5.9 and could enable authenticated attackers to inject arbitrary PHP objects into the application.

Critical Impact

Authenticated attackers with low privileges can exploit this PHP Object Injection vulnerability to potentially achieve remote code execution, manipulate application data, or compromise the underlying WordPress installation.

Affected Products

• PeakShops WordPress Theme versions up to and including 1.5.9
• WordPress installations using vulnerable PeakShops theme versions
• Websites built with fuelthemes PeakShops theme

Discovery Timeline

• 2026-02-20 - CVE CVE-2025-69294 published to NVD
• 2026-02-24 - Last updated in NVD database

Technical Details for CVE-2025-69294

Vulnerability Analysis

This vulnerability is classified as CWE-502 (Deserialization of Untrusted Data). The PeakShops WordPress theme fails to properly validate or sanitize serialized data before processing it through PHP's deserialization functions. When user-controlled serialized input is passed to unserialize() or similar functions without adequate validation, attackers can craft malicious serialized strings that instantiate arbitrary PHP objects.

The attack requires network access and low-privilege authentication to the WordPress installation. Once exploited, the vulnerability can lead to complete compromise of confidentiality, integrity, and availability of the affected system. The scope remains unchanged, meaning the impact is contained within the vulnerable component's security authority.

Root Cause

The root cause of this vulnerability lies in the improper handling of serialized PHP data within the PeakShops theme. The application deserializes user-supplied input without implementing proper validation, type checking, or allowlist-based filtering of acceptable object classes. This architectural weakness allows attackers to inject crafted serialized payloads that, when deserialized, can trigger dangerous "magic methods" such as __wakeup(), __destruct(), or __toString() in existing classes within the codebase or its dependencies.

Attack Vector

The attack is executed over the network and requires an authenticated user account with low privileges. The attacker submits a specially crafted serialized PHP payload through vulnerable input points in the PeakShops theme. When the application deserializes this malicious input, it instantiates attacker-controlled objects that can chain through available "gadget classes" to achieve code execution, file manipulation, or database access.

The exploitation process typically involves:

1. Identifying serialized data handling endpoints in the theme
2. Analyzing available PHP classes for exploitable magic methods (gadget chains)
3. Crafting a Property-Oriented Programming (POP) chain payload
4. Submitting the malicious serialized string through the vulnerable input

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

Detection Methods for CVE-2025-69294

Indicators of Compromise

• Unusual serialized data patterns in web server access logs, particularly containing O: (object) prefixes with unexpected class names
• PHP error logs showing deserialization failures or instantiation of unexpected class objects
• Evidence of file system modifications or new files created by the web server user
• Suspicious database queries or modifications originating from theme-related functions

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block serialized PHP object patterns in request parameters
• Monitor PHP error logs for deserialization-related warnings or exceptions
• Deploy runtime application self-protection (RASP) solutions to detect object injection attempts
• Review web server access logs for requests containing suspicious serialized payloads

Monitoring Recommendations

• Enable verbose logging for the WordPress installation and PeakShops theme
• Configure alerting for any PHP deserialization errors or unusual object instantiation
• Implement file integrity monitoring on theme directories and WordPress core files
• Monitor outbound network connections from the web server for potential reverse shell activity

How to Mitigate CVE-2025-69294

Immediate Actions Required

• Update the PeakShops theme to the latest patched version as soon as one becomes available
• If a patch is not yet available, consider temporarily disabling or removing the PeakShops theme
• Implement WAF rules to filter serialized PHP object patterns from incoming requests
• Audit user accounts and remove unnecessary low-privilege accounts that could be used to exploit this vulnerability
• Review server logs for any signs of prior exploitation attempts

Patch Information

Organizations should monitor the Patchstack vulnerability database for updates on official patches from fuelthemes. Until a patch is released, implement the workarounds and detection strategies outlined below to reduce exposure.

Workarounds

• Deploy a Web Application Firewall with rules to block serialized PHP object patterns in request data
• Restrict authentication to trusted users only and implement strong access controls
• Consider using WordPress security plugins that provide object injection protection
• Implement PHP runtime hardening by disabling dangerous functions in php.ini if not required by other applications

# Example WAF rule pattern for ModSecurity to detect PHP object injection
# Add to your ModSecurity rules configuration
SecRule ARGS "@rx O:\d+:\"[^\"]+\":\d+:{" \
    "id:100001,phase:2,deny,status:403,\
    msg:'PHP Object Injection Attempt Detected',\
    tag:'application-multi',tag:'language-php',\
    tag:'platform-multi',tag:'attack-injection',\
    severity:'CRITICAL'"