CVE-2025-32607: WpBookingly Object Injection Vulnerability

CVE-2025-32607 Overview

CVE-2025-32607 is a critical Insecure Deserialization vulnerability affecting the WpBookingly WordPress plugin developed by magepeopleteam. The vulnerability allows attackers to perform PHP Object Injection through the deserialization of untrusted data, potentially leading to remote code execution, unauthorized data access, or complete site compromise.

Critical Impact

This vulnerability allows unauthenticated attackers to inject malicious PHP objects, which can be leveraged for remote code execution, data exfiltration, or complete WordPress site takeover when combined with suitable gadget chains.

Affected Products

• WpBookingly WordPress Plugin versions up to and including 1.2.0
• WordPress sites utilizing the WpBookingly service booking functionality
• magepeopleteam Service Booking Manager plugin

Discovery Timeline

• April 11, 2025 - CVE-2025-32607 published to NVD
• April 11, 2025 - Last updated in NVD database

Technical Details for CVE-2025-32607

Vulnerability Analysis

This vulnerability falls under CWE-502 (Deserialization of Untrusted Data), a critical weakness class that occurs when an application deserializes data from an untrusted source without adequate validation. In the context of WpBookingly, the plugin processes serialized PHP data without properly sanitizing or validating the input, allowing attackers to inject arbitrary PHP objects.

The attack can be executed remotely over the network without requiring authentication or user interaction, making it highly exploitable. Successful exploitation could result in complete compromise of the confidentiality, integrity, and availability of the affected WordPress installation.

Root Cause

The root cause of CVE-2025-32607 lies in the unsafe use of PHP's unserialize() function on user-controllable input within the WpBookingly plugin. When an application deserializes untrusted data without implementing proper safeguards such as allowed class whitelisting, attackers can instantiate arbitrary objects and manipulate their properties. If the WordPress installation contains classes with magic methods like __wakeup(), __destruct(), or __toString() that perform dangerous operations, these can be chained together to achieve code execution.

Attack Vector

The attack vector for this vulnerability is network-based and requires no privileges or user interaction. An attacker can craft a malicious serialized PHP payload and submit it to the vulnerable endpoint in the WpBookingly plugin. The payload contains specially crafted object references that, when deserialized, trigger a chain of method calls (known as a POP chain or gadget chain) leading to arbitrary code execution.

The exploitation process typically involves:

1. Identifying the vulnerable deserialization endpoint in the WpBookingly plugin
2. Analyzing available classes in WordPress core, themes, or plugins for usable gadget chains
3. Constructing a malicious serialized payload that chains these gadgets
4. Submitting the payload to trigger object injection and subsequent code execution

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

Detection Methods for CVE-2025-32607

Indicators of Compromise

• Unusual PHP serialized data patterns in HTTP request parameters containing object references (e.g., O: prefix patterns)
• Unexpected file creation or modification in WordPress directories
• Suspicious outbound network connections from the web server
• New admin users or modified user privileges without authorized changes
• Web shell files or backdoors appearing in plugin or theme directories

Detection Strategies

• Monitor web application logs for requests containing serialized PHP object patterns targeting WpBookingly endpoints
• Implement Web Application Firewall (WAF) rules to detect and block PHP object injection attempts
• Deploy file integrity monitoring to detect unauthorized changes to WordPress core, plugin, and theme files
• Use endpoint detection solutions like SentinelOne to identify post-exploitation activity such as shell execution or unauthorized process spawning

Monitoring Recommendations

• Enable detailed WordPress activity logging and review for suspicious administrative actions
• Configure alerting for new file creation in WordPress directories, particularly in wp-content/plugins/ and wp-content/uploads/
• Monitor database queries for unusual patterns that might indicate data exfiltration
• Implement network-level monitoring for unexpected outbound connections from WordPress servers

How to Mitigate CVE-2025-32607

Immediate Actions Required

• Update WpBookingly plugin to a version newer than 1.2.0 once a patch is available from magepeopleteam
• If no patch is available, consider temporarily disabling the WpBookingly plugin until a fix is released
• Review WordPress user accounts for unauthorized additions or privilege escalations
• Scan the WordPress installation for indicators of compromise including web shells and backdoors
• Implement WAF rules to block requests containing PHP serialized object patterns

Patch Information

At the time of publication, organizations should monitor the Patchstack WordPress Vulnerability Report for updates on official patches. Update the WpBookingly plugin to the latest available version once a security fix is released by magepeopleteam.

Workarounds

• Temporarily disable the WpBookingly plugin if it is not critical to site operations
• Implement strict WAF rules to filter requests containing serialized PHP data patterns
• Restrict access to the WordPress admin panel to trusted IP addresses only
• Enable PHP's disable_functions directive to prevent execution of dangerous functions like exec(), system(), and passthru()
• Consider using a WordPress security plugin that provides object injection protection

# Example .htaccess rule to block potential serialized object injection attempts
# Add to WordPress root .htaccess file
<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteCond %{QUERY_STRING} (O:|a:|s:)[0-9]+: [NC,OR]
    RewriteCond %{REQUEST_BODY} (O:|a:|s:)[0-9]+: [NC]
    RewriteRule .* - [F,L]
</IfModule>