CVE-2023-33562: Phpjabbers Time Slots Booking Calendar

Critical severity, CVSS 9.8. EPSS: 0.8% chance of exploitation in the next 30 days.

User enumeration is found in in PHP Jabbers Time Slots Booking Calendar v3.3. This issue occurs during password recovery, where a difference in messages could allow an attacker to determine if the user is valid or not, enabling a brute force attack with valid users.

Affected products

• Phpjabbers Time Slots Booking Calendar: version 3.3 only

Published 2023-08-01. Last modified 2026-06-17.