CVE-2022-29233

Improper access control for breakout rooms in BigBlue Button

MEDIUM
4.3
CVSS Score
Published: June 1, 2022 at 11:15 PM UTC
Updated: June 17, 2026 at 04:39 AM UTC
1 product affected across 1 vendorBigbluebutton

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Severity
MEDIUM4.3
Exploit prediction
EPSS 1%
SSVC
No known exploit

Description

BigBlueButton is an open source web conferencing system. In BigBlueButton starting with 2.2 but before 2.3.18 and 2.4-rc-1, an attacker can circumvent access controls to gain access to all breakout rooms of the meeting they are in. The permission checks rely on knowledge of internal ids rather than on verification of the role of the user. Versions 2.3.18 and 2.4-rc-1 contain a patch for this issue. There are currently no known workarounds.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 2.3.18v < 2.4-rc-12.2.0 ≤ v < 2.3.182.4 alpha12.4 alpha22.4 beta12.4 beta22.4 beta32.4 beta4
Affected range stops below 2.3.18, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.4-rc-1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.3MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-285

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