CVE-2025-49377 is a missing authorization vulnerability found in Themefic Hydra Booking, a WordPress plugin used for booking and appointment management, affecting versions up to and including 1.1.9. The core issue stems from incorrectly configured access control security levels, which allow unauthenticated remote attackers to bypass authorization checks. This means attackers can access sensitive booking data or perform actions reserved for authorized users without any authentication or user interaction. The vulnerability has a CVSS 3.1 base score of 7.5, with the vector indicating network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), unchanged scope (S:U), high confidentiality impact (C:H), and no impact on integrity or availability (I:N/A:N). Although no public exploits have been reported yet, the vulnerability’s characteristics make it a serious threat, especially for organizations relying on Hydra Booking to manage customer appointments and sensitive personal data. The lack of proper authorization checks can lead to unauthorized data disclosure, potentially violating privacy regulations such as GDPR. The vulnerability was reserved in June 2025 and published in October 2025, with no patches currently linked, indicating that organizations must monitor for updates or consider temporary mitigations.

For European organizations, the primary impact is unauthorized disclosure of confidential booking and customer data, which can include personally identifiable information (PII). This exposure risks non-compliance with GDPR and other data protection laws, potentially resulting in legal penalties and reputational damage. Since the vulnerability does not affect integrity or availability, operational disruption is less likely; however, the confidentiality breach alone is significant. Organizations in sectors such as tourism, healthcare, education, and professional services that use Hydra Booking for client scheduling are particularly at risk. Attackers exploiting this vulnerability could harvest sensitive data for identity theft, fraud, or targeted phishing campaigns. The ease of exploitation (no authentication or user interaction required) increases the likelihood of attacks, especially in environments where the plugin is publicly accessible. The absence of known exploits in the wild currently limits immediate risk but does not diminish the urgency for mitigation given the vulnerability’s characteristics.

1. Monitor Themefic’s official channels for security patches addressing CVE-2025-49377 and apply updates promptly once available. 2. Until patches are released, restrict access to the Hydra Booking plugin’s administrative and sensitive endpoints via network-level controls such as IP whitelisting or VPN access. 3. Implement web application firewall (WAF) rules to detect and block unauthorized access attempts targeting booking-related endpoints. 4. Conduct thorough access control reviews and harden plugin configurations to ensure only authorized users can access sensitive data or perform privileged actions. 5. Enable detailed logging and monitoring of booking system access to detect anomalous activities indicative of exploitation attempts. 6. Educate IT and security teams about the vulnerability’s nature and encourage rapid incident response readiness. 7. Consider temporary disabling the plugin if the risk outweighs operational needs until a secure version is available. 8. Review and enhance overall WordPress security posture, including least privilege principles for user roles and regular vulnerability scanning.