What is CVE-2023-48831?

CVE-2023-48831 is a high-severity vulnerability in Phpjabbers Availability Booking Calendar, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2023-12-07.

How severe is CVE-2023-48831?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2023-48831 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Resource exhaustion in Phpjabbers Availability Booking Calendar

CVE-2023-48831

A lack of rate limiting in pjActionAJaxSend in Availability Booking Calendar 5.0 allows attackers to cause resource exhaustion.

Vulnerability class: DoS (Denial of Service)

Published 2023-12-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.012 (65.9th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 65.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Phpjabbers Availability Booking Calendar — versions 5.0

Weakness classification (CWE)

Public proof-of-concept exploits

References

www.phpjabbers.com/availability-booking-calendar/ (Product)
packetstormsecurity.com/files/176039 (Exploit, VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2023-48831?: CVE-2023-48831 is a high-severity vulnerability in Phpjabbers Availability Booking Calendar, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2023-12-07.
How severe is CVE-2023-48831?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2023-48831 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.