CVE-2024-3229 in Salon Booking System Plugin
Summary
by MITRE • 06/19/2024
The Salon booking system plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the SLN_Action_Ajax_ImportAssistants function along with missing authorization checks in all versions up to, and including, 10.2. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible.
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Analysis
by VulDB Data Team • 06/19/2024
The vulnerability identified as CVE-2024-3229 affects the Salon booking system plugin for WordPress, presenting a critical security risk that stems from inadequate input validation and authorization mechanisms within the plugin's codebase. This flaw exists in the SLN_Action_Ajax_ImportAssistants function where the system fails to properly validate file types during upload operations, creating an avenue for malicious actors to exploit the system's trust in user-provided data. The vulnerability is particularly concerning because it affects all versions up to and including 10.2, indicating that a significant portion of users may be exposed to this risk without awareness of the potential compromise.
The technical implementation of this vulnerability allows for arbitrary file uploads through a combination of missing file type validation and insufficient authorization checks that should normally prevent unauthorized access to critical system functions. When an attacker uploads a malicious file through the vulnerable import assistants functionality, the system lacks proper validation to ensure that only legitimate file types are accepted. This absence of validation creates a direct pathway for attackers to potentially upload executable files, script files, or other malicious content that could be executed on the target server. The lack of authorization checks means that even unauthenticated users can access the vulnerable endpoint, removing any barriers that would normally prevent unauthorized file manipulation.
The operational impact of this vulnerability extends beyond simple file upload capabilities, as the ability to upload arbitrary files can lead to full system compromise through remote code execution. Attackers who successfully exploit this vulnerability can potentially gain persistent access to the affected WordPress installation, allowing them to modify website content, steal sensitive data, or use the compromised system as a launching point for further attacks within the network. This vulnerability directly aligns with CWE-434 which describes insecure file upload vulnerabilities where applications accept files without proper validation of their type, size, or content. The implications are particularly severe for WordPress installations that rely on third-party plugins, as the compromised plugin can serve as a foothold for attackers to escalate privileges and move laterally within the web infrastructure.
From a threat modeling perspective, this vulnerability maps directly to several ATT&CK techniques including T1190 for Exploit Public-Facing Application and T1059 for Command and Scripting Interpreter, as attackers can upload malicious files that execute commands on the target system. The attack surface is expanded by the fact that no authentication is required to exploit this vulnerability, making it particularly dangerous for publicly accessible websites. Organizations running affected versions of the Salon booking system plugin should immediately implement mitigations including updating to the latest version, implementing additional file type validation at the web server level, and monitoring for suspicious file upload activities. The vulnerability represents a clear violation of secure coding practices and demonstrates the critical importance of validating all user inputs and implementing proper access controls for administrative functions within web applications.
The remediation approach should include immediate patching of the plugin to version 10.3 or later where the file validation and authorization checks have been properly implemented. Additionally, administrators should consider implementing web application firewalls that can detect and block suspicious file upload patterns, and conduct thorough security audits of all installed plugins to identify similar vulnerabilities. The vulnerability also highlights the need for comprehensive security testing during the development lifecycle, particularly for functions that handle user uploads and require elevated privileges. Organizations should also implement monitoring solutions that can detect unusual file upload patterns and alert security teams to potential exploitation attempts. This vulnerability serves as a reminder that even seemingly simple functionality like file imports can present significant security risks when proper validation and authorization controls are not implemented.