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Public proof of conceptFix available

CVE-2021-38294

A public proof of concept exists; no exploitation attested.

  • Published2021-10-25
  • Fixed in2.2.1 · 2.1.1 · 1.2.4
  • WeaknessCWE-74 · CWE-78

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A Command Injection vulnerability exists in the getTopologyHistory service of the Apache Storm 2.x prior to 2.2.1 and Apache Storm 1.x prior to 1.2.4. A specially crafted thrift request to the Nimbus server allows Remote Code Execution (RCE) prior to authentication.

Timeline

dates in UTC
  1. 2021-10-2513:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-11-04 09:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-38294?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-38294?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV
Apache storm
BranchAffectedFixed in
2.2≥ 2.2.0, < 2.2.12.2.1
2.1≥ 2.1.0, < 2.1.12.1.1
2.x≥ 2.0.0, < 2.1.12.1.1
1.x≥ 1.0.0, < 1.2.41.2.4

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • stormopenEuler:20.03-LTS-SP2all versions · fixed in 1.2.4-1.oe1
  • stormopenEuler:20.03-LTS-SP1all versions · fixed in 1.2.4-1.oe1

Full record on NVD

Fix

  1. Update Apache storm to 2.2.1 · 2.1.1 · 1.2.4

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
1 moduleexploit/linux/misc/nimbus_gettopologyhistory_cmd_execrank: excellentModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2021-10-25
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-6768-mcjc-8223

Frequently asked questions

What is CVE-2021-38294?

A Command Injection vulnerability exists in the getTopologyHistory service of the Apache Storm 2.x prior to 2.2.1 and Apache Storm 1.x prior to 1.2.4. A specially crafted thrift request to the Nimbus server allows Remote Code Execution (RCE) prior to authentication.

Is CVE-2021-38294 actively exploited?

Active exploitation of CVE-2021-38294 has not been confirmed. Its EPSS score was 83.8% on 2026-11-03, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-38294?

CVE-2021-38294 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record