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TI-2023-30643 Aliases CVE-2023-54393GHSA-ghgx-426v-hj74

PocketMine-MP before 4.20.5 Denial of Service via LoginPacket

Priority MEDIUM 45CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0063 50th percentileScored 2026-11-07
Fix Fixed PocketMine-MP (pmmp): 4.20.5, 4.21.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
pmmpPocketMine-MPbefore 4.20.5; 4.21.0 to before 4.21.14.20.5, 4.21.1Patch availableCNA
  • PocketMine-MP Vendorpmmp Affected before 4.20.5; 4.21.0 to before 4.21.1 Fixed in 4.20.5, 4.21.1 Patch available CNA

Remediation

  • Fix · CNA PocketMine-MP (pmmp) Fixed in 4.20.5, 4.21.1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-54393
  2. 2026-10-03 Alias added: GHSA-ghgx-426v-hj74
  3. 2026-10-28 EPSS moved to the 50th–90th percentile

References

Patch 2

Advisory 1

  • TI-2026-58990 PocketMine-MP before 5.41.1 LogDoS via LoginPacket clientData CVSS 4.0HIGH 8.7
  • TI-2026-58988 PocketMine-MP before 5.43.1 Denial of Service via unauthenticated login CVSS 4.0HIGH 8.7
  • TI-2026-58993 PocketMine-MP before 5.39.2 Denial of Service via ModalFormResponsePacket CVSS 4.0HIGH 7.1
  • TI-2024-38460 PocketMine-MP before 5.11.1 Denial of Service via LoginPacket CVSS 4.0HIGH 8.7
  • TI-2023-30640 PocketMine-MP before 5.3.1 Denial of Service via LoginPacket CVSS 4.0HIGH 8.7
  • TI-2022-26446 PocketMine-MP before 3.26.5 and 4.0.5 Denial of Service via Skin Data CVSS 4.0HIGH 8.7
See all 32 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences