CVE-2023-6360 in My Calendar Plugin
Summary
by MITRE • 11/30/2023
The 'My Calendar' WordPress Plugin, version < 3.4.22 is affected by an unauthenticated SQL injection vulnerability in the 'from' and 'to' parameters in the '/my-calendar/v1/events' rest route.
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Analysis
by VulDB Data Team • 12/21/2023
The vulnerability identified as CVE-2023-6360 affects the My Calendar WordPress plugin, specifically versions prior to 3.4.22, presenting a critical unauthenticated SQL injection flaw within the REST API endpoint. This vulnerability resides in the /my-calendar/v1/events route where the 'from' and 'to' parameters are processed without adequate input sanitization or validation. The flaw allows attackers to manipulate database queries through crafted input values, potentially enabling unauthorized data access, modification, or deletion across the affected WordPress installation.
The technical implementation of this vulnerability stems from improper parameter handling within the plugin's REST API framework. When the 'from' and 'to' parameters are passed to the events endpoint, the plugin fails to employ proper prepared statements or input filtering mechanisms. This creates an exploitable condition where malicious actors can inject arbitrary SQL commands through the parameter values, bypassing authentication requirements entirely. The vulnerability aligns with CWE-89, which categorizes SQL injection as a common weakness in web applications where user-supplied data is directly incorporated into database queries without proper sanitization.
Operationally, this vulnerability presents significant risks to WordPress installations using the affected plugin version. Attackers can exploit the flaw to extract sensitive information from the database including user credentials, personal data, and calendar events. The unauthenticated nature of the exploit means that no valid user credentials are required to initiate the attack, making it particularly dangerous for publicly accessible websites. Additionally, successful exploitation could enable attackers to modify calendar entries, potentially leading to service disruption or information tampering. The impact extends beyond simple data theft as the vulnerability could serve as a foothold for further attacks within the compromised WordPress environment.
Mitigation strategies for CVE-2023-6360 should prioritize immediate patching of the My Calendar plugin to version 3.4.22 or later, which includes the necessary fixes for the SQL injection vulnerability. System administrators should also implement network-level protections including firewall rules that restrict access to the affected REST API endpoint when possible. Input validation should be enhanced at the application level with proper parameter sanitization and prepared statement usage. Security monitoring should be implemented to detect unusual patterns in API requests that might indicate exploitation attempts. Organizations should also consider implementing web application firewalls and regular security scanning to identify similar vulnerabilities in other plugins or themes. The ATT&CK framework categorizes this vulnerability under T1190 - Exploit Public-Facing Application, highlighting the importance of securing externally accessible web services and maintaining up-to-date software components to prevent exploitation.