Executive Summary

CVE-2026-27095 is a critical PHP Object Injection vulnerability found in the WordPress Bus Ticket Booking with Seat Reservation Plugin versions up to and including 5.6.0.

This vulnerability allows unauthenticated attackers to inject malicious PHP objects into the application, potentially leading to remote code execution, SQL injection, path traversal, denial of service, and other attacks if a suitable Property Oriented Programming (POP) chain is available.

It falls under the OWASP Top 10 category A3: Injection and requires no privileges to exploit.

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Impact Analysis

This vulnerability can have severe impacts including allowing attackers to execute arbitrary code remotely on your server.

It can also lead to SQL injection, which may compromise your database integrity and confidentiality.

Other possible impacts include path traversal attacks, denial of service, and other malicious activities that can disrupt your website's operation and security.

Because it requires no authentication, attackers can exploit it easily, potentially affecting thousands of websites regardless of their traffic or popularity.

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Detection Guidance

The vulnerability is a PHP Object Injection in the WordPress Bus Ticket Booking with Seat Reservation Plugin versions up to 5.6.0. Detection typically involves monitoring for exploitation attempts targeting this plugin.

While no specific detection commands are provided, users can look for unusual HTTP requests or payloads attempting PHP Object Injection patterns in web server logs.

Patchstack offers a mitigation rule that can block attacks exploiting this vulnerability, which may include detection capabilities.

It is recommended to use web application firewalls (WAFs) or intrusion detection systems (IDS) configured to detect PHP Object Injection attempts targeting this plugin.

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Mitigation Strategies

Immediate mitigation is strongly advised due to the critical severity (CVSS 9.8) of this vulnerability.

• Apply the mitigation rule provided by Patchstack to block attacks exploiting this vulnerability until an official patch is released.
• Monitor for updates from the plugin developer Magepeople Inc. and update the plugin to a patched version once available.
• Seek assistance from hosting providers or web developers to apply mitigations or harden the environment.
• Use web application firewalls or security tools to detect and block exploitation attempts.

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Compliance Impact

The vulnerability allows unauthenticated attackers to perform PHP Object Injection, potentially leading to remote code execution, SQL injection, path traversal, denial of service, and other attacks. Such security breaches can result in unauthorized access to sensitive data or disruption of services.

While the provided information does not explicitly mention compliance with standards like GDPR or HIPAA, exploitation of this vulnerability could lead to data breaches or service interruptions that may violate these regulations' requirements for data protection and system security.

Therefore, organizations using the affected plugin versions should consider this vulnerability a significant risk to compliance and take immediate mitigation steps to prevent potential regulatory violations.

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