CVE-2025-12399 is a vulnerability in the Alex Reservations: Smart Restaurant Booking WordPress plugin that allows authenticated users with Administrator-level privileges or higher to upload arbitrary files through the REST API endpoint /wp-json/srr/v1/app/upload/file. The root cause is the absence of proper file type validation, categorized under CWE-434 (Unrestricted Upload of File with Dangerous Type). Exploitation could lead to remote code execution on the hosting server. The issue affects all versions up to and including 2.2.3. No patch or official fix information is currently provided.

An attacker with Administrator-level access can upload arbitrary files, potentially leading to remote code execution. This compromises the confidentiality, integrity, and availability of the affected system. The CVSS 3.1 base score of 7.2 reflects a high impact due to network attack vector, low attack complexity, and high privileges required.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict Administrator access to trusted users only and consider disabling or restricting the vulnerable REST endpoint if possible. Monitor for updates from the vendor regarding patches or official mitigations.