BigBlueButton is an open-source virtual classroom. In versions 3.0.19 and below, when first joining a session with the microphone muted, the client sends audio to the server regardless of mute state. Media is discarded at the server side, so it isn't audible to any participants, but this may allow for malicious server operators to access audio data. The behavior is only incorrect between joining the meeting and the first time the user unmutes. This issue has been fixed in version 3.0.20.
Metrics
Affected Vendors & Products
References
History
Thu, 26 Feb 2026 19:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:2.3:a:bigbluebutton:bigbluebutton:*:*:*:*:*:*:*:* |
Wed, 25 Feb 2026 10:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Mon, 23 Feb 2026 15:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Bigbluebutton
Bigbluebutton bigbluebutton |
|
| Vendors & Products |
Bigbluebutton
Bigbluebutton bigbluebutton |
Sat, 21 Feb 2026 07:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | BigBlueButton is an open-source virtual classroom. In versions 3.0.19 and below, when first joining a session with the microphone muted, the client sends audio to the server regardless of mute state. Media is discarded at the server side, so it isn't audible to any participants, but this may allow for malicious server operators to access audio data. The behavior is only incorrect between joining the meeting and the first time the user unmutes. This issue has been fixed in version 3.0.20. | |
| Title | BigBlueButton: Audio from participants to the server initially unmuted | |
| Weaknesses | CWE-200 | |
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-02-21T07:18:26.156Z
Updated: 2026-02-24T18:49:12.218Z
Reserved: 2026-02-19T17:25:31.101Z
Link: CVE-2026-27467
Updated: 2026-02-24T18:49:04.296Z
Status : Analyzed
Published: 2026-02-21T08:16:11.827
Modified: 2026-02-26T18:54:09.117
Link: CVE-2026-27467
No data.