CVE-2023-33563: Phpjabbers Time Slots Booking Calendar

High severity, CVSS 8.8. EPSS: 0.8% chance of exploitation in the next 30 days.

In PHP Jabbers Time Slots Booking Calendar 3.3 , lack of verification when changing an email address and/or password (on the Profile Page) allows remote attackers to take over accounts.

Affected products

• Phpjabbers Time Slots Booking Calendar: version 3.3 only

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