CVE-2025-32571 Overview
CVE-2025-32571 is a PHP Object Injection vulnerability in the TuriTop Booking System WordPress plugin. The flaw stems from deserialization of untrusted data [CWE-502] and affects all plugin versions up to and including 1.0.10. Authenticated attackers with low privileges can submit crafted serialized payloads to the plugin, triggering instantiation of arbitrary PHP objects within the WordPress runtime. Successful exploitation can lead to remote code execution, data tampering, or full site compromise depending on the gadget chains available in the WordPress environment.
Critical Impact
Authenticated object injection enabling arbitrary PHP object instantiation, potentially resulting in remote code execution and full compromise of WordPress sites running TuriTop Booking System ≤ 1.0.10.
Affected Products
- TuriTop Booking System WordPress plugin (turitop-booking-system)
- All versions from n/a through 1.0.10
- WordPress sites with the plugin installed and active
Discovery Timeline
- 2025-04-17 - CVE-2025-32571 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-32571
Vulnerability Analysis
The vulnerability resides in code paths within the TuriTop Booking System plugin that pass attacker-controlled input to PHP's unserialize() function. When the plugin deserializes untrusted data, attackers can craft serialized strings that instantiate arbitrary PHP classes loaded by WordPress, the plugin itself, or other active plugins and themes.
Object injection exploitation typically chains together magic methods such as __wakeup(), __destruct(), and __toString() across available classes to achieve secondary effects. These effects range from arbitrary file writes and SQL injection to direct command execution, depending on gadget classes present in the environment.
The attack requires only low-privilege authentication and traverses the network without user interaction. Successful exploitation impacts confidentiality, integrity, and availability of the underlying WordPress installation.
Root Cause
The root cause is improper handling of serialized data submitted to the plugin. The application invokes unserialize() on input without validating its source or restricting allowed classes through allowed_classes options. This violates secure deserialization practices outlined under [CWE-502].
Attack Vector
An authenticated attacker submits a malicious serialized payload to a vulnerable endpoint exposed by the plugin. The plugin deserializes the payload, instantiating attacker-chosen PHP objects. Triggered magic methods then execute the attacker's gadget chain within the WordPress process context. The vulnerability is exploitable remotely over HTTP/HTTPS against any WordPress site running the affected plugin version.
No public proof-of-concept code has been released. Technical details are documented in the Patchstack WordPress Vulnerability Report.
Detection Methods for CVE-2025-32571
Indicators of Compromise
- HTTP POST requests to TuriTop Booking System endpoints containing serialized PHP patterns such as O:, a:, or s: followed by class names and lengths.
- Unexpected PHP processes spawning shell commands, writing to wp-content, or initiating outbound connections from the WordPress host.
- New or modified PHP files in WordPress directories that do not align with plugin update activity.
- Unusual entries in WordPress logs referencing plugin actions invoked by low-privilege accounts.
Detection Strategies
- Inspect web server access logs for request bodies and query parameters matching PHP serialization signatures targeting turitop-booking-system paths.
- Deploy web application firewall rules that flag or block serialized object patterns in requests to plugin endpoints.
- Correlate authenticated low-privilege session activity with subsequent file system or process anomalies on the host.
Monitoring Recommendations
- Enable PHP error and audit logging to capture unserialize() invocations and class instantiations from plugin code.
- Monitor file integrity on wp-content/plugins, wp-content/uploads, and core WordPress files for unauthorized changes.
- Track outbound network connections from the web server process to detect command-and-control or data exfiltration activity.
How to Mitigate CVE-2025-32571
Immediate Actions Required
- Deactivate the TuriTop Booking System plugin if a patched version is not yet available for your site.
- Restrict access to WordPress authenticated endpoints by enforcing strong authentication and reviewing low-privilege user accounts.
- Audit the WordPress installation for indicators of compromise, including unexpected files, scheduled tasks, and administrative accounts.
- Apply virtual patching via a web application firewall to block serialized payloads targeting plugin endpoints.
Patch Information
At the time of CVE publication, the vendor advisory indicates the vulnerability affects all versions through 1.0.10. Site operators should consult the Patchstack advisory and the WordPress plugin repository for the latest fixed release before re-enabling the plugin.
Workarounds
- Remove the plugin entirely from production sites until a vendor-supplied patch is verified and deployed.
- Restrict plugin functionality to trusted users only and remove unused contributor or subscriber accounts that could be abused for authenticated access.
- Configure a web application firewall to inspect and drop requests containing PHP serialization markers to plugin URIs.
# Configuration example: disable the vulnerable plugin via WP-CLI
wp plugin deactivate turitop-booking-system
wp plugin uninstall turitop-booking-system
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
