CVE-2023-36133: Phpjabbers Availability Booking Calendar

Critical severity, CVSS 9.8. EPSS: 0.9% chance of exploitation in the next 30 days.

PHPJabbers Availability Booking Calendar 5.0 is vulnerable to User Account Takeover through username/password change.

Affected products

• Phpjabbers Availability Booking Calendar: version 5.0 only

Published 2023-08-04. Last modified 2026-06-17.