CVE-2025-23914: Muzaara Google Ads Report Vulnerability

CVE-2025-23914 Overview

CVE-2025-23914 is a critical Deserialization of Untrusted Data vulnerability affecting the Muzaara Google Ads Report WordPress plugin. This security flaw allows unauthenticated attackers to perform PHP Object Injection attacks, potentially leading to full site compromise through remote code execution, data exfiltration, or complete system takeover.

Critical Impact

Unauthenticated attackers can exploit this PHP Object Injection vulnerability to execute arbitrary code, manipulate data, or gain complete control over affected WordPress installations running the Muzaara Google Ads Report plugin.

Affected Products

• Muzaara Google Ads Report plugin versions up to and including 3.1
• WordPress installations with the vulnerable plugin activated
• Sites using the muzaara-adwords-optimize-dashboard plugin slug

Discovery Timeline

• 2025-01-22 - CVE-2025-23914 published to NVD
• 2025-01-22 - Last updated in NVD database

Technical Details for CVE-2025-23914

Vulnerability Analysis

This vulnerability stems from improper handling of serialized data within the Muzaara Google Ads Report WordPress plugin. The plugin fails to adequately validate or sanitize user-supplied serialized input before passing it to PHP's unserialize() function, creating a classic PHP Object Injection attack surface.

When exploited, an attacker can craft malicious serialized objects that, upon deserialization, trigger dangerous "magic methods" such as __wakeup(), __destruct(), or __toString(). If the WordPress environment contains suitable "gadget chains" — classes with exploitable magic methods — this can escalate to arbitrary code execution.

The network-accessible nature of this vulnerability, combined with no authentication requirements and no user interaction needed, makes it particularly dangerous for internet-facing WordPress sites.

Root Cause

The root cause is classified as CWE-502 (Deserialization of Untrusted Data). The plugin accepts serialized PHP data from untrusted sources and deserializes it without proper validation. This architectural flaw allows attackers to instantiate arbitrary PHP objects with attacker-controlled properties.

PHP's unserialize() function is inherently dangerous when used with untrusted input, as it can instantiate any serializable class available in the application's scope and trigger magic methods automatically during the deserialization process.

Attack Vector

The attack vector for this vulnerability is network-based, requiring no authentication or user interaction. An attacker can craft a malicious HTTP request containing a specially crafted serialized PHP object payload. When the vulnerable plugin processes this input, the malicious object is instantiated, potentially triggering a chain of method calls that result in code execution.

The exploitation typically follows this pattern:

1. Attacker identifies the vulnerable endpoint accepting serialized data
2. Attacker crafts a malicious serialized object leveraging available gadget chains
3. The crafted payload is sent to the target WordPress site
4. Upon deserialization, magic methods execute attacker-controlled operations
5. Depending on available gadgets, this can result in file writes, command execution, or other malicious actions

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

Detection Methods for CVE-2025-23914

Indicators of Compromise

• Unusual HTTP requests containing serialized PHP data patterns (strings starting with O:, a:, or s: followed by numeric values)
• Unexpected file modifications in the WordPress installation, particularly in wp-content/plugins/ or wp-content/uploads/ directories
• Web server logs showing POST requests with abnormally large or encoded payloads targeting plugin endpoints
• New or modified PHP files with suspicious content or obfuscated code

Detection Strategies

• Monitor web application firewall (WAF) logs for serialized PHP object patterns in request parameters and bodies
• Implement file integrity monitoring to detect unauthorized changes to WordPress core, plugin, and theme files
• Review WordPress user accounts for newly created administrator accounts or privilege escalations
• Scan for known PHP webshell signatures and backdoor patterns in the WordPress installation

Monitoring Recommendations

• Enable detailed logging on web servers to capture full request bodies for forensic analysis
• Configure alerting for requests containing PHP serialization markers (O:[0-9]+:, a:[0-9]+:, etc.)
• Monitor outbound network connections from the web server for potential command and control communication
• Implement database activity monitoring to detect unauthorized data access or modifications

How to Mitigate CVE-2025-23914

Immediate Actions Required

• Identify all WordPress installations running the Muzaara Google Ads Report plugin and audit their version numbers
• If using version 3.1 or earlier, immediately disable the plugin until a patched version is available
• Review server and application logs for signs of exploitation attempts
• Conduct a security assessment of affected sites to check for indicators of compromise

Patch Information

As of the CVE publication date, no official patch has been confirmed. Website administrators should monitor the Patchstack Security Advisory and the WordPress plugin repository for updates. Consider removing the plugin entirely if it is not critical to site functionality.

Workarounds

• Disable and deactivate the Muzaara Google Ads Report plugin until a security patch is released
• Implement WAF rules to block requests containing PHP serialized object patterns targeting the plugin
• Restrict access to WordPress admin and plugin directories using IP-based allowlisting where feasible
• Consider using alternative Google Ads reporting solutions that do not have known security vulnerabilities

# Disable the plugin via WP-CLI (recommended approach)
wp plugin deactivate muzaara-adwords-optimize-dashboard

# Verify the plugin is deactivated
wp plugin list --status=inactive | grep muzaara