high8.1
CVE-2026-46353
BigBlueButton is an open-source virtual classroom.
Impact
BigBlueButton is an open-source virtual classroom. Prior to 3.0.21, bbb-web checksum validation could be bypassed when a presentationUploadExternalUrl parameter was supplied to API request handling in CreateMeeting.java and ValidationService.java, allowing a user to send valid requests to some endpoints without a checksum. This issue is fixed in version 3.0.21.
Affected products
| Product | Affected versions |
|---|---|
| BigBlueButton Is An Open-Source Virtual Classroom. | before 3.0.21 |
Versions were read from the advisory text. No structured product data has been published for this record yet.