Security Advisory

CVE-2026-55489

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-08-20 21:36:35

Last updated 2026-08-21 11:23:38

Assigner GitHub_M

CVSS score 4.9

State PUBLISHED

Description

BigBlueButton is an open-source virtual classroom. Prior to 3.0.29, BigBlueButton presenters could submit a presentationId through /api/graphql that identified a presentation belonging to another meeting. akka-bbb-apps/src/main/scala/org/bigbluebutton/core/apps/presentationpod/RemovePresentationPubMsgHdlr.scala did not verify the presentation's meeting identifier before deletion, allowing a presenter who knew the identifier to delete another meeting's presentation and disrupt its availability. This issue is fixed in version 3.0.29.

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