CVE-2025-61602

HighCVSS 7.5/10Last modified Oct 19, 2026

Description

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-703

Affected software

No affected versions have been published.

Timeline

Published: Oct 9, 2025
Last modified: Oct 19, 2026
NVD status: Analyzed

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