PocketMine-MP versions prior to 4.18.1 contain an improper input validation vulnerability in inventory transaction handling. A remote attacker with a valid player session can request that the server drop more items than are available in the player's hotbar, triggering a server crash and resulting in denial of service.
https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-h87r-f4vc-mchv
https://github.com/pmmp/PocketMine-MP/commit/5897476
https://github.com/pmmp/PocketMine-MP/blob/4.18.1/changelogs/4.18.md
Published: 2025-12-31
Updated: 2025-12-31
Base Score: 7.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C
Severity: High
Base Score: 7.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Severity: High
Base Score: 7.1
Vector: 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
Severity: High
EPSS: 0.00195