CVE-2025-61602
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.
- Score
- CVSS 3.1 7.5 High
- Status
- Analyzed - security-advisories@github.com
- Published
- 2025-10-09
- Last modified
- 2026-10-19
- Weaknesses
- CWE-703
Affected products
References
- https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-45j2-m26c-3pcm
- https://github.com/bigbluebutton/bigbluebutton/pull/23651
