CVE-2023-48840: Phpjabbers Appointment Scheduler

High severity, CVSS 7.5. EPSS: 1.1% chance of exploitation in the next 30 days.

A lack of rate limiting in pjActionAjaxSend in Appointment Scheduler 3.0 allows attackers to cause resource exhaustion.

Affected products

• Phpjabbers Appointment Scheduler: version 3.0 only

Published 2023-12-07. Last modified 2026-06-17.