---
title: "CVE-2021-38294: Shell Command Injection Vulnerability… | CubePath"
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…"
language: en
source: https://cubepath.com/security/cve/CVE-2021-38294
---

# CVE-2021-38294: Shell Command Injection Vulnerability… | CubePath

## 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.

Official description from the CVE record, published by apache. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2021-38294)

## Key data

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.83805 (83.8% probability)

Percentile

99.7%

Scores of

Nov 10, 2026

Model

v2026.06.15

### Weakness (CWE)

CWE catalog version 5.0.

CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license.

- [CWE-74](https://cwe.mitre.org/data/definitions/74.html) Improper Neutralization of Special Elements in Output Used by a Downstream Component

## Affected products

Products listed in the CVE record, as the CNA published them.

- Apache Storm

  - affected: v1.0.0 up to before Apache Storm\*
- Apache Storm

  - affected: Apache Storm up to before v1.2.4

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [lists.apache.org/thread.html/r5fe881f6ca883908b7a0f005d3511…](https://lists.apache.org/thread.html/r5fe881f6ca883908b7a0f005d35115af49f43beea7a8b0915e377859%40%3Cuser.storm.apache.org%3E)
- [seclists.org/oss-sec/2021/q4/44](https://seclists.org/oss-sec/2021/q4/44)
- [packetstormsecurity.com/files/165019/Apache-Storm-Nimbus-2.…](http://packetstormsecurity.com/files/165019/Apache-Storm-Nimbus-2.2.0-Command-Execution.html)

## Timeline

1. ID reserved Aug 9, 2021
2. Record published Oct 25, 2021
3. Record last updated Aug 4, 2024

## Look up another CVE

## About CubePath

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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:02 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)