BigBlueButton CVE-2026-41127
MEDIUM
Authorization Bypass Through User-Controlled Key (CWE-639)
2026-04-22
[email protected]
6.5
CVSS 3.1
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CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Lifecycle Timeline
1
Analysis Generated
Apr 22, 2026 - 00:58 vuln.today
DescriptionNVD
BigBlueButton is an open-source virtual classroom. Versions prior to 3.0.24 have a missing authorization that allows viewers to inject/overwrite captions Version 3.0.24 tightened the permissions on who is able to submit captions. No known workarounds are available.
AnalysisAI
BigBlueButton versions prior to 3.0.24 allow authenticated viewers to inject or overwrite captions due to missing authorization controls, enabling unauthorized modification of classroom content. The vulnerability requires an authenticated session but does not need user interaction, affecting the integrity of real-time collaboration in virtual classroom deployments. …
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External POC / Exploit Code
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Destination URL
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