What is CVE-2023-54393?

CVE-2023-54393 is a high-severity vulnerability, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2026-09-09.

How severe is CVE-2023-54393?

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

CVE-2023-54393

CVE-2023-54393

PocketMine-MP versions before 4.20.5 contain a denial of service vulnerability in LoginPacket JSON parsing due to improper validation in the JsonMapper dependency. Attackers can send malformed JSON structures in LoginPacket to crash the server.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

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.

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2023-54393?: CVE-2023-54393 is a high-severity vulnerability, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2026-09-09.
How severe is CVE-2023-54393?: High severity. CVSS v3 base score is 7.5 out of 10.