CVE-2026-22507: Beelove Object Injection Vulnerability

CVE-2026-22507 Overview

CVE-2026-22507 is a critical Insecure Deserialization vulnerability affecting the AncoraThemes Beelove WordPress theme. This PHP Object Injection flaw allows unauthenticated attackers to inject malicious serialized objects into the application, potentially leading to remote code execution, data manipulation, or complete system compromise.

Critical Impact

Unauthenticated attackers can exploit this PHP Object Injection vulnerability to achieve arbitrary code execution on WordPress sites running the vulnerable Beelove theme, potentially leading to full site takeover.

Affected Products

• AncoraThemes Beelove WordPress Theme version 1.2.6 and earlier
• WordPress installations using the Beelove theme

Discovery Timeline

• 2026-03-25 - CVE CVE-2026-22507 published to NVD
• 2026-03-26 - Last updated in NVD database

Technical Details for CVE-2026-22507

Vulnerability Analysis

This vulnerability stems from improper handling of serialized data within the Beelove WordPress theme. The application deserializes user-supplied input without adequate validation, enabling attackers to craft malicious serialized PHP objects that, when processed, trigger dangerous operations through the theme's existing class methods.

PHP Object Injection vulnerabilities are particularly dangerous in WordPress environments due to the extensive class ecosystem available through WordPress core, plugins, and themes. When a vulnerable deserialization point exists, attackers can leverage "POP chains" (Property-Oriented Programming) by chaining together gadget classes to achieve arbitrary code execution, file manipulation, or database access.

The unauthenticated nature of this vulnerability significantly increases its risk, as no prior authentication is required for exploitation. Attackers can remotely target any WordPress site running the affected Beelove theme versions without needing valid credentials.

Root Cause

The vulnerability exists due to the use of PHP's unserialize() function on untrusted user input without proper validation or sanitization. The Beelove theme fails to implement safe deserialization practices, such as using json_decode() instead of unserialize(), or employing allowlists for acceptable classes during deserialization.

Attack Vector

The attack is executed over the network without requiring authentication. An attacker crafts a malicious serialized PHP object containing payloads designed to exploit magic methods (such as __wakeup(), __destruct(), or __toString()) present in available classes. When the vulnerable code deserializes this crafted input, the malicious object is instantiated and triggers the attack chain.

The exploitation typically involves identifying suitable gadget classes within the WordPress installation, constructing a serialized payload that chains these classes together, and submitting this payload to the vulnerable deserialization endpoint. For detailed technical information about this vulnerability, refer to the Patchstack WordPress Vulnerability Report.

Detection Methods for CVE-2026-22507

Indicators of Compromise

• Unusual serialized data patterns in HTTP request parameters or POST bodies containing O: or a: prefixes followed by class names
• Web server access logs showing requests with encoded serialized PHP objects targeting theme-related endpoints
• Unexpected PHP file creations or modifications in WordPress directories
• Anomalous database queries or new administrator accounts created without authorization

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block serialized PHP object patterns in incoming requests
• Monitor for suspicious HTTP requests containing serialized data targeting WordPress theme endpoints
• Deploy file integrity monitoring on WordPress installations to detect unauthorized changes
• Review web server logs for requests containing base64-encoded or URL-encoded serialized payloads

Monitoring Recommendations

• Enable detailed logging for all WordPress theme-related HTTP requests and responses
• Configure alerts for PHP process execution anomalies and unexpected outbound connections from the web server
• Implement real-time monitoring of WordPress user creation events and privilege changes
• Monitor for unusual file system activity within the wp-content/themes/beelove/ directory

How to Mitigate CVE-2026-22507

Immediate Actions Required

• Update the AncoraThemes Beelove theme to the latest patched version immediately
• If no patch is available, consider temporarily deactivating the Beelove theme and switching to a secure alternative
• Implement WAF rules to block requests containing serialized PHP objects targeting WordPress installations
• Audit WordPress installations for signs of compromise, including unauthorized user accounts or modified files

Patch Information

Organizations should check the Patchstack WordPress Vulnerability Report for the latest patch information and update guidance from AncoraThemes. Ensure WordPress and all themes are configured for automatic security updates where possible.

Workarounds

• Implement server-side input validation to reject requests containing serialized PHP object patterns before they reach WordPress
• Deploy a web application firewall with rules specifically designed to detect PHP object injection attempts
• Restrict access to WordPress admin areas using IP allowlisting where feasible
• Consider using WordPress security plugins that provide runtime protection against deserialization attacks

# Example WAF rule pattern to block serialized PHP objects (ModSecurity)
SecRule REQUEST_BODY "@rx O:\d+:\"[a-zA-Z_][a-zA-Z0-9_]*\":\d+:{" \
    "id:100001,phase:2,deny,status:403,msg:'PHP Object Injection Attempt Blocked'"