CVE-2023-51297: Phpjabbers Hotel Booking System

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

A lack of rate limiting in the 'Email Settings' feature of PHPJabbers Hotel Booking System v4.0 allows attackers to send an excessive amount of email for a legitimate user, leading to a possible Denial of Service (DoS) via a large amount of generated e-mail messages.

Affected products

• Phpjabbers Hotel Booking System: version 4.0 only

Published 2025-02-19. Last modified 2026-06-17.