CVE-2025-8492 in Salon Booking System, Appointment Scheduling for Salons, Spas & Small Businesses Plugin
Summary
by MITRE • 09/11/2025
The Salon Booking System, Appointment Scheduling for Salons, Spas & Small Businesses plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the ajax function in all versions up to, and including, 10.20. This makes it possible for unauthenticated attackers to execute AJAX actions, including limited file uploads.
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Analysis
by VulDB Data Team • 09/11/2025
The Salon Booking System plugin for WordPress represents a widely used solution for managing appointments in beauty and wellness businesses, yet it contains a critical security vulnerability that undermines the integrity of user data. This vulnerability stems from a fundamental flaw in the plugin's access control mechanisms, specifically within its ajax handling functions. The issue affects all versions up to and including 10.20, indicating that a significant portion of users may be exposed to potential exploitation without immediate awareness of the risk.
The technical root cause of this vulnerability lies in the absence of proper capability checks within the ajax processing functions. When a WordPress plugin implements ajax functionality, it must verify that the requesting user possesses the appropriate permissions to perform the requested action. In this case, the plugin fails to validate user privileges before executing sensitive operations, creating a path for unauthorized modification of data. This missing capability check represents a classic security misconfiguration that aligns with CWE-863, which addresses "Incorrect Authorization" in software systems. The vulnerability specifically enables unauthenticated attackers to manipulate the plugin's ajax endpoints, effectively bypassing the normal authentication and authorization processes that should protect these functions.
The operational impact of this vulnerability extends beyond simple data modification to encompass potential file upload capabilities that could be exploited for more severe consequences. Attackers can leverage this flaw to execute limited file uploads through the ajax interface, which could potentially allow them to introduce malicious code into the WordPress environment. This capability significantly increases the attack surface and could lead to complete system compromise if combined with other vulnerabilities or if the uploaded files are executed as code. The vulnerability affects not just individual user data but could potentially impact the entire WordPress installation, particularly if the plugin's file upload functionality is not properly sandboxed or restricted.
The implications of this vulnerability align with several tactics outlined in the ATT&CK framework, particularly those related to privilege escalation and persistence within web applications. Attackers could use this vulnerability to gain unauthorized access to booking data, customer information, and potentially manipulate scheduling systems to disrupt business operations. The lack of authentication checks creates a direct pathway for attackers to modify appointment records, potentially leading to service disruptions, financial loss, or data breaches that could expose sensitive customer information. Organizations using this plugin should immediately assess their exposure and implement mitigations to prevent exploitation while awaiting official patches from the plugin developers.
Security professionals should consider this vulnerability as part of a broader assessment of WordPress plugin security, particularly focusing on how ajax endpoints are protected within third-party solutions. The vulnerability demonstrates the critical importance of proper input validation and access control in web applications, as well as the necessity of regular security audits of installed plugins. Organizations should implement network-level protections, monitor for suspicious ajax activity, and ensure that all WordPress installations maintain current versions of plugins and themes to minimize exposure to known vulnerabilities.