A lack of rate limiting in the "Login Section, Forgot Email" feature of PHPJabbers Hotel Booking System v4.0 allows attackers to send an excessive amount of reset requests for a legitimate user, leading to a possible Denial of Service (DoS) via a large amount of generated e-mail messages.
Conclusion & alert: CVE-2023-51301 is rated High Exploit Risk (61.1/100): CVSS High severity, with low exploitation likelihood (EPSS 0.23%). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-04-01 | 0.32% | 0.23% | -0.09% |
| 2 | 2026-03-31 | 0.21% | 0.32% | +0.11% |
| 3 | 2026-03-30 | — | 0.21% | — |
Full EPSS history (15 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| phpjabbers | hotel_booking_system | 4.0 | cpe:2.3:a:phpjabbers:hotel_booking_system:4.0:*:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| https://packetstorm.news/files/id/176486 | Exploit Third Party Advisory VDB Entry |
| https://www.phpjabbers.com/hotel-booking-system/#sectionDemo | Product |
| http://packetstormsecurity.com/files/176486/PHPJabbers-Hotel-Booking-System-4.0-Missing-Rate-Limiting.html |