CVE-2023-54393CWE-20

CVE-2023-54393

High · published September 9, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
27.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00350 · 27.4th percentile
Weakness
CWE-20 · Improper Input Validation
Published
2026-09-09T18:17Z
References (4)
https://github.com/pmmp/PocketMine-MP/commit/09668a37d66c6023685a948b7550c918620e98f2 · [email protected]https://github.com/pmmp/PocketMine-MP/commit/a31902a31f5b6fdb832f57c0e3a3f16a3b41c012 · [email protected]https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-pqp3-8rrw-g8vm · [email protected]https://www.vulncheck.com/advisories/pocketmine-mp-before-4.20.5-denial-of-service-via-loginpacket · [email protected]
EPSS history
Timeline
  • 11 SEP 03:12Z
    EPSS moved — → 0%
    epss
  • 09 SEP 13:31Z
    PocketMine-MP before 4.20.5 Denial of Service via LoginPacket
    cvelistv5