Security readout for executives and security teams
Plain-English summary
This flaw lets a meeting participant bypass BigBlueButton chat locks briefly after lock settings change. The business impact is limited but real: locked public or private chat controls may not be enforced for about five seconds. Patched versions are available, and the sources name no workaround.
Executive priority
Treat as a scheduled patching item, not an emergency, unless chat lock enforcement is critical to compliance, classroom safety, or controlled-event moderation. Upgrade during the next maintenance window and confirm affected versions are removed.
Technical view
CVE-2022-29234 is an authorization/control enforcement issue in BigBlueButton 2.2 through before 2.3.18 and 2.4 through before 2.4.1. A low-privileged meeting participant could send messages to a locked chat during a five-second grace period after any meeting lock setting changed. CVSS is 4.3, integrity impact low.
Likely exposure
Exposure is limited to organizations running affected BigBlueButton versions with meetings that use public or private chat lock settings. The attacker must already be a meeting participant, reducing external exposure but leaving risk in classrooms, webinars, and moderated meetings.
Exploitation context
The bundle does not show CISA KEV listing or active exploitation evidence. The issue is plausible in ordinary meetings because it requires only participant access and timing around a lock setting change, but the documented impact is limited to unauthorized chat messages.
Researcher notes
The advisory maps the issue to CWE-285 and describes a five-second grace period after lock setting changes. Sources state patched releases are 2.3.18 and 2.4.1 and that no known workaround exists. Evidence provided does not establish exploitation in the wild.
Mitigation direction
- Upgrade BigBlueButton 2.3 deployments to version 2.3.18 or later.
- Upgrade BigBlueButton 2.4 deployments to version 2.4.1 or later.
- Check current BigBlueButton vendor guidance before relying on alternative mitigations.
- Review moderated-meeting procedures until affected systems are upgraded.
Validation and detection
- Inventory BigBlueButton servers and record exact installed versions.
- Confirm no deployment remains in the affected 2.2, 2.3, or 2.4 version ranges.
- Verify patched systems report version 2.3.18, 2.4.1, or later.
- Review meeting configurations that depend on chat locks for moderation controls.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-285: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2022-29234 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N2.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-36vc-c338-6xjvCVE reference · x_refsource_CONFIRM
- https://github.com/bigbluebutton/bigbluebutton/pull/13850CVE reference · x_refsource_MISC
- https://github.com/bigbluebutton/bigbluebutton/pull/14265CVE reference · x_refsource_MISC
- https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.3.18CVE reference · x_refsource_MISC
- https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.4.1CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Authorization
Improper Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.