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Vulnerability record · CVE-2021-48007 · published 6 September 2026

CVE-2021-48007: Improper input validation vulnerability

PocketMine-MP versions before 3.18.1 fail to validate NaN or INF values in MovePlayerPacket position and rotation fields. Malicious clients can send crafted movement packets with invalid floating-point values to crash servers through unhandled mathematical operations or prevent clients from rendering other players.

7.1 CVSS 4.0 High EPSS 0.30% · top 80.1% CWE-20 · Improper input validation Deferred
7.1CVSS 4.0 base score
0.30%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
9 Sep 2026Last modified by NVD

Description

PocketMine-MP versions before 3.18.1 fail to validate NaN or INF values in MovePlayerPacket position and rotation fields. Malicious clients can send crafted movement packets with invalid floating-point values to crash servers through unhandled mathematical operations or prevent clients from rendering other players.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/pmmp/PocketMine-MP/commit/fb20bb38327b4c08ee3976640cd0dd547388a638
https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-fm35-jgg3-3grx
https://www.vulncheck.com/advisories/pocketmine-mp-before-3.18.1-denial-of-service-via-moveplayerpacket

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Source: NIST National Vulnerability Database (record CVE-2021-48007), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.