CVE-2021-48007

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-06. 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 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 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
22%
KEV
Not listed

Published

September 6, 2026

Last Modified

September 9, 2026

Advisory Details (3)

Auto-updated Sep 6, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit.
generic

PocketMine-MP before 3.18.1 Denial of Service via MovePlayerPacket | Advisories | VulnCheck

https://www.vulncheck.com/advisories/pocketmine-mp-before-3.18.1-denial-of-service-via-moveplayerpacket
github_commit

commit fb20bb38327b (pmmp/PocketMine-MP)

Fix landed in pmmp/PocketMine-MP commit fb20bb38327b — awaiting tagged release

https://github.com/pmmp/PocketMine-MP/commit/fb20bb38327b4c08ee3976640cd0dd547388a638
github Patch Available🟡 PoC Available

NaN/INF in serverbound movement packets can crash clients and servers · Advisory · pmmp/PocketMine-MP · GitHub

https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-fm35-jgg3-3grx

Vendor Advisories for CVE-2021-48007(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-mp3.0.0 ... 3.9.8 (120 versions)3.18.1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 20× in last 7d / 43× 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 19:24 UTCEPSS rescore
  2. 2026-09-18 13:47 UTCEG score recompute
  3. 2026-09-18 13:47 UTCGHSA enrichment
  4. 2026-09-17 19:23 UTCEPSS rescore
  5. 2026-09-17 13:52 UTCEG score recompute
  6. 2026-09-17 13:52 UTCGHSA enrichment
  7. 2026-09-16 14:05 UTCEPSS rescore
  8. 2026-09-16 14:05 UTCEPSS rescore
  9. 2026-09-16 13:56 UTCEG score recompute
  10. 2026-09-16 13:56 UTCGHSA enrichment
  11. 2026-09-15 14:01 UTCEG score recompute
  12. 2026-09-15 14:01 UTCGHSA enrichment
  13. 2026-09-15 03:06 UTCEPSS rescore
  14. 2026-09-14 14:06 UTCEG score recompute
  15. 2026-09-14 14:06 UTCGHSA enrichment
  16. 2026-09-13 14:11 UTCEG score recompute
  17. 2026-09-13 14:11 UTCGHSA enrichment
  18. 2026-09-12 14:57 UTCEPSS rescore
  19. 2026-09-12 14:16 UTCEG score recompute
  20. 2026-09-12 14:16 UTCGHSA enrichment
  21. 2026-09-11 14:49 UTCEPSS rescore
  22. 2026-09-11 14:21 UTCEG score recompute
  23. 2026-09-11 14:21 UTCGHSA enrichment
  24. 2026-09-11 09:33 UTCEPSS rescore
  25. 2026-09-10 14:26 UTCEG score recompute
Show 18 more
  1. 2026-09-10 14:26 UTCGHSA enrichment
  2. 2026-09-09 14:31 UTCEG score recompute
  3. 2026-09-09 14:31 UTCGHSA enrichment
  4. 2026-09-09 14:09 UTCEG score recompute
  5. 2026-09-09 14:09 UTCGHSA enrichment
  6. 2026-09-08 21:57 UTCEPSS rescore
  7. 2026-09-08 20:13 UTCGHSA enrichment
  8. 2026-09-08 16:16 UTCEG score recompute
  9. 2026-09-08 16:16 UTCGHSA enrichment
  10. 2026-09-07 15:58 UTCEPSS rescore
  11. 2026-09-07 14:07 UTCGHSA enrichment
  12. 2026-09-06 13:24 UTCEG score recompute
  13. 2026-09-06 13:24 UTCGHSA enrichment
  14. 2026-09-06 12:59 UTCEG score recompute
  15. 2026-09-06 12:59 UTCGHSA enrichment
  16. 2026-09-06 12:22 UTCEG score recompute
  17. 2026-09-06 12:12 UTCEG score recompute
  18. 2026-09-06 12:09 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-48007?
CVE-2021-48007 is a medium vulnerability published on September 6, 2026. 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…
When was CVE-2021-48007 disclosed?
CVE-2021-48007 was first published in the National Vulnerability Database on September 6, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-48007 actively exploited?
CVE-2021-48007 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 77.6% of all scored CVEs.
What is the CVSS score of CVE-2021-48007?
CVE-2021-48007 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2021-48007?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-48007, 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-2021-48007

Explore →

Is Your Infrastructure Affected by CVE-2021-48007?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs