CVE-2023-54392CWE-20

CVE-2023-54392

Medium · published September 9, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
30.3
In the wild
Unconfirmed
What it is

PocketMine-MP versions >= 4.20.0 before 4.22.3 (and before 5.2.1 in the 5.x branch) fail to validate NBT tag types in BlockActorDataPacket. A player can crash the server by sending a packet containing sign NBT data with an incorrect tag type, triggering an unhandled UnexpectedTagTypeException that terminates the server process.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
7.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00376 · 30.3th percentile
Weakness
CWE-20 · Improper Input Validation
Published
2026-09-09T18:17Z
References (3)
https://github.com/pmmp/PocketMine-MP/commit/0c250a2ef09627b48aa52302f6cc7e1f2afb70ea · [email protected]https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-7wrv-6h42-w54f · [email protected]https://www.vulncheck.com/advisories/pocketmine-mp-before-4.22.3-denial-of-service-via-blockactordatapacket · [email protected]
EPSS history
Timeline
  • 11 SEP 03:12Z
    EPSS moved — → 0%
    epss
  • 09 SEP 13:31Z
    PocketMine-MP before 4.22.3 Denial of Service via BlockActorDataPacket
    cvelistv5