CVE-2026-106003 in Court Reservation Plugin
Summary
by MITRE • 10/28/2026
The Court Reservation WordPress plugin before 1.12.4 does not perform any authorization, authentication or nonce validation on one of its AJAX actions, allowing unauthenticated users to add or delete reservation types in the Court Reservation WordPress plugin before 1.12.4's configuration.
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Analysis
by VulDB Data Team • 10/28/2026
The vulnerability identified in versions of the Court Reservation WordPress plugin prior to version 1.12.4 represents a critical failure in access control mechanisms, specifically categorized under CWE-862 Missing Authorization and CWE-307 Improper Restriction of Excessive Authentication Attempts when considering the broader context of unauthenticated actions. This flaw stems from the absence of nonce validation, authentication checks, or capability verification within one of the plugin's AJAX endpoints. In standard WordPress development practices, AJAX handlers must verify that the requesting user is logged in and possesses the necessary administrative privileges to perform state-changing operations. The lack of these safeguards allows any individual with network access to interact directly with the endpoint without providing valid credentials or security tokens.
From a technical perspective, this deficiency enables unauthenticated attackers to manipulate the plugin's configuration data by adding or deleting reservation types. Reservation types typically define the parameters for booking courts, such as duration, pricing structures, availability windows, and resource allocation rules. By exploiting this vulnerability, an attacker can inject malicious configurations that disrupt normal operations or create backdoors within the application logic. For instance, an attacker could delete critical reservation categories to cause service denial, rendering the system unable to process new bookings for specific court types. Alternatively, they might add custom reservation types with altered parameters that bypass existing business rules, potentially leading to revenue loss if pricing is manipulated or resource conflicts are introduced into the scheduling algorithm.
The operational impact of this vulnerability extends beyond mere configuration changes. It compromises the integrity and availability of the WordPress site hosting the plugin. Since the attacker can modify core settings without authorization, they effectively gain a form of administrative control over the booking system's behavior. This can lead to significant reputational damage for businesses relying on accurate court reservations, as well as potential financial losses due to incorrect bookings or operational downtime. Furthermore, if these reservation types are linked to payment gateways or user accounts in more complex integrations, the vulnerability could serve as a stepping stone for further attacks, such as privilege escalation or data exfiltration, depending on how the plugin interacts with other system components.
Mitigation strategies must focus on immediate remediation and future hardening of WordPress plugins against similar flaws. The primary solution is to upgrade the Court Reservation plugin to version 1.12.4 or later, where the developers have presumably implemented proper nonce verification and capability checks in the affected AJAX handler. For organizations unable to update immediately due to compatibility constraints, temporary mitigations include restricting access to wp-admin-ajax.php via web application firewall rules that block unauthenticated POST requests targeting known vulnerable endpoints, although this requires careful tuning to avoid disrupting legitimate functionality. Additionally, administrators should audit other custom plugins for similar patterns of missing authentication and nonce validation, ensuring adherence to WordPress coding standards which mandate the use of check_admin_referer or wp_verify_nonce functions in all AJAX handlers performing state changes. Regular security audits and penetration testing are recommended to identify such authorization bypasses before they can be exploited by malicious actors.