high7.5
CVE-2025-61602
BigBlueButton is an open-source virtual classroom.
Impact
BigBlueButton is an open-source virtual classroom. A denial-of-service (DoS) vulnerability in versions prior to 3.0.13 allows any authenticated user to crash the chat functionality for all participants in a meeting by sending a malformed `reactionEmojiId` in the GraphQL mutation `chatSendMessageReaction`. Version 3.0.13 contains a patch. No known workarounds are available.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Bigbluebutton | Bigbluebutton | before 3.0.13 |