What is CVE-2023-54390?

CVE-2023-54390 is a high-severity vulnerability in Pmmp Pocketmine-Mp, classified under CWE-1025. CVSS score: 7.5/10. Published 2026-09-09.

How severe is CVE-2023-54390?

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

Vulnerability in Pmmp Pocketmine-Mp

CVE-2023-54390

PocketMine-MP versions before 5.3.1 and 4.23.1 contain a denial of service vulnerability in LoginPacket JSON parsing due to improper null value handling in arrays. Attackers can send malformed JSON with unexpected null elements in LoginPacket to crash the server.

Published 2026-09-09 · last modified 2026-10-08.

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: 0.003 (26.2th percentile), scored 2026-10-25.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 26.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Pmmp Pocketmine-Mp

Weakness classification (CWE)

CWE-1025

References

github.com/pmmp/PocketMine-MP/security/advisories/GHSA-92jh-gwch-jq38 (vendor-advisory)
github.com/pmmp/PocketMine-MP/commit/4f90e8dab1c9df331fad7d3d89823404e882668c (patch)
www.vulncheck.com/advisories/pocketmine-mp-before-5.3.1-denial-of-service-via-l… (third-party-advisory)

Frequently asked questions

What is CVE-2023-54390?: CVE-2023-54390 is a high-severity vulnerability in Pmmp Pocketmine-Mp, classified under CWE-1025. CVSS score: 7.5/10. Published 2026-09-09.
How severe is CVE-2023-54390?: High severity. CVSS v3 base score is 7.5 out of 10.