CVE-2022-29234 — BigBlueButton is an open source web conferencing system
BigBlueButton is an open source web conferencing system. Starting in version 2.2 and prior to versions 2.3.18 and 2.4.1, an attacker could send messages to a locked chat within a grace period of 5s any lock setting in the meeting was changed. The attacker needs to be a participan
Published
2022-06-01T23:20:14.000Z
Last modified
2025-04-23T18:20:10.802Z
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
01What is this vulnerability?
BigBlueButton is an open source web conferencing system. Starting in version 2.2 and prior to versions 2.3.18 and 2.4.1, an attacker could send messages to a locked chat within a grace period of 5s any lock setting in the meeting was changed. The attacker needs to be a participant in the meeting. Versions 2.3.18 and 2.4.1 contain a patch for this issue. There are currently no known workarounds.
02Affected products
| Vendor | Product | Versions |
|---|
| bigbluebutton | bigbluebutton | >= 2.2, < 2.3.18, >= 2.4, < 2.4.1 |
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2022-06-01T23:20:14.000Z
- Last modified: 2025-04-23T18:20:10.802Z
09References
- github.com — https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-36vc-c33…
- github.com — https://github.com/bigbluebutton/bigbluebutton/pull/13850
- github.com — https://github.com/bigbluebutton/bigbluebutton/pull/14265
- github.com — https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.3.18
- github.com — https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.4.1
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