CVE-2023-39423: Resortdata Internet Reservation Module Next Generation

Critical severity, CVSS 9.1. EPSS: 0.6% chance of exploitation in the next 30 days.

The RDPData.dll file exposes the /irmdata/api/common endpoint that handles session IDs,  among other features. By using a UNION SQL operator, an attacker can leak the sessions table, obtain the currently valid sessions and impersonate a currently logged-in user.

Affected products

• Resortdata Internet Reservation Module Next Generation: version 5.3.2.15 only

Published 2023-09-07. Last modified 2026-06-17.