CVE-2026-41127
BigBlueButton's missing authorization allows viewer to inject/overwrite captions
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-639 |
| Vendor | bigbluebutton |
| Product | bigbluebutton |
| Published | Apr 21, 2026 |
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CVSS v3 Breakdown
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
Affected Versions
bigbluebutton / bigbluebutton
< 3.0.24