CVE-2025-14383 identifies a critical SQL Injection vulnerability in the Booking Calendar plugin for WordPress, maintained by wpdevelop. The flaw exists in all plugin versions up to and including 10.14.8 and is triggered via the 'dates_to_check' parameter. This parameter is insufficiently sanitized and improperly escaped before being incorporated into SQL queries, allowing attackers to inject arbitrary SQL commands. The vulnerability is time-based blind SQL Injection, meaning attackers can infer database information by measuring response times, even without direct error messages. Crucially, exploitation requires no authentication or user interaction, making it accessible to remote unauthenticated attackers. The vulnerability compromises confidentiality by enabling attackers to extract sensitive data from the backend database, such as user credentials, personal information, or site configuration data. The CVSS v3.1 score of 7.5 reflects a high-severity rating due to network attack vector, low complexity, no privileges required, no user interaction, and high impact on confidentiality. No known public exploits have been reported yet, but the widespread use of WordPress and this plugin increases the risk of future exploitation. The lack of a patch at the time of publication further elevates the threat. This vulnerability stems from CWE-89, which involves improper neutralization of special elements in SQL commands, a common and dangerous web application security flaw.

For European organizations, the impact of CVE-2025-14383 can be significant, especially for those relying on WordPress websites with the Booking Calendar plugin installed. Successful exploitation can lead to unauthorized disclosure of sensitive information stored in the website’s database, including personal data protected under GDPR, customer information, and internal business data. This can result in data breaches, reputational damage, regulatory fines, and loss of customer trust. Since the vulnerability requires no authentication, attackers can target publicly accessible websites indiscriminately, increasing the attack surface. The time-based blind SQL Injection method may slow exploitation but does not diminish the severity of data exposure risks. Organizations in sectors such as e-commerce, hospitality, and services that use booking systems are particularly vulnerable. Additionally, the exploitation could serve as a foothold for further attacks, such as privilege escalation or lateral movement within the hosting environment. The lack of known exploits currently provides a window for proactive mitigation before widespread abuse occurs.

European organizations should immediately audit their WordPress installations to identify the presence of the Booking Calendar plugin and verify its version. Since no official patch is currently available, temporary mitigations include disabling the plugin until a fix is released or restricting access to the affected parameter via web application firewalls (WAFs) by blocking or sanitizing requests containing suspicious payloads targeting 'dates_to_check'. Implementing strict input validation and parameterized queries at the application or database level can reduce risk. Monitoring web server and application logs for anomalous query patterns or unusual delays indicative of time-based SQL Injection attempts is critical. Organizations should subscribe to vendor advisories and apply patches promptly once released. Additionally, employing database activity monitoring and limiting database user privileges to the minimum necessary can mitigate the impact of successful injections. Regular backups and incident response plans should be updated to handle potential data breaches. Finally, educating developers and administrators about secure coding practices and SQL Injection risks will help prevent similar vulnerabilities.