CVE-2023-54392

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-09. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
6.5
EG Score
6.5(high)
EG Risk
29(Track)
EG Risk 29/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
31%
KEV
Not listed

Published

September 9, 2026

Last Modified

September 18, 2026

Advisory Details (3)

Auto-updated Sep 9, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit.
generic

PocketMine-MP before 4.22.3 Denial of Service via BlockActorDataPacket | Advisories | VulnCheck

https://www.vulncheck.com/advisories/pocketmine-mp-before-4.22.3-denial-of-service-via-blockactordatapacket
github_commit

commit 0c250a2ef096 (pmmp/PocketMine-MP)

Fix landed in pmmp/PocketMine-MP commit 0c250a2ef096 — awaiting tagged release

https://github.com/pmmp/PocketMine-MP/commit/0c250a2ef09627b48aa52302f6cc7e1f2afb70ea
github Patch Available🟡 PoC Available

Server crash using badly formatted sign NBT in BlockActorDataPacket · Advisory · pmmp/PocketMine-MP · GitHub

https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-7wrv-6h42-w54f

Vendor Advisories for CVE-2023-54392(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFixed inDependents
pocketmine/pocketmine-mp4.20.0 ... 4.22.2 (11 versions)4.22.3—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 22× in last 7d / 32× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-18 19:26 UTCEPSS rescore
  2. 2026-09-18 18:33 UTCEG score recompute
  3. 2026-09-18 18:33 UTCGHSA enrichment
  4. 2026-09-18 17:30 UTCEG score recompute
  5. 2026-09-18 17:30 UTCGHSA enrichment
  6. 2026-09-18 01:05 UTCEG score recompute
  7. 2026-09-18 01:05 UTCGHSA enrichment
  8. 2026-09-17 00:33 UTCEG score recompute
  9. 2026-09-17 00:33 UTCGHSA enrichment
  10. 2026-09-16 14:06 UTCEPSS rescore
  11. 2026-09-16 05:11 UTCEPSS rescore
  12. 2026-09-16 05:11 UTCEPSS rescore
  13. 2026-09-16 00:01 UTCEG score recompute
  14. 2026-09-16 00:01 UTCGHSA enrichment
  15. 2026-09-15 03:08 UTCEPSS rescore
  16. 2026-09-14 23:29 UTCGHSA enrichment
  17. 2026-09-13 22:52 UTCEG score recompute
  18. 2026-09-13 22:52 UTCGHSA enrichment
  19. 2026-09-13 16:45 UTCEPSS rescore
  20. 2026-09-12 22:21 UTCEG score recompute
  21. 2026-09-12 22:21 UTCGHSA enrichment
  22. 2026-09-12 14:58 UTCEPSS rescore
  23. 2026-09-11 21:49 UTCEG score recompute
  24. 2026-09-11 21:49 UTCGHSA enrichment
  25. 2026-09-11 14:51 UTCEPSS rescore
Show 7 more
  1. 2026-09-11 09:34 UTCEPSS rescore
  2. 2026-09-10 21:16 UTCGHSA enrichment
  3. 2026-09-09 20:44 UTCEG score recompute
  4. 2026-09-09 20:43 UTCGHSA enrichment
  5. 2026-09-09 14:27 UTCEG score recompute
  6. 2026-09-09 13:36 UTCEG score recompute
  7. 2026-09-09 13:34 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2023-54392?
CVE-2023-54392 is a medium vulnerability published on September 9, 2026. 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…
When was CVE-2023-54392 disclosed?
CVE-2023-54392 was first published in the National Vulnerability Database on September 9, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-54392 actively exploited?
CVE-2023-54392 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 68.5% of all scored CVEs.
What is the CVSS score of CVE-2023-54392?
CVE-2023-54392 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2023-54392?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-54392, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2023-54392

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