Security Advisory

CVE-2026-46353

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-16 18:06:54

Last updated 2026-07-16 18:41:31

Assigner GitHub_M

CVSS score 8.1

State PUBLISHED

Description

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.

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