BigBlueButton vulnerable to Chat DoS via invalid reactionEmojiId_CVE-2025-61602

7.5 / 10

HIGH

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

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.

Basic Information

ID CVE-2025-61602

Source GitHub_M

Published Oct 9, 2025 at 20:40

Affected Product

Vendor bigbluebutton

Product bigbluebutton

Version < 3.0.13

Affected Versions bigbluebutton bigbluebutton < 3.0.13

CWE Classification

CWE-703

References

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    "published": "2025-10-09T20:40:04.658Z",
    "modified": "2025-10-09T20:40:04.658Z",
    "type": "cve",
    "title": "BigBlueButton vulnerable to Chat DoS via invalid reactionEmojiId",
    "source": "GitHub_M",
    "references": "https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-45j2-m26c-3pcm\nhttps://github.com/bigbluebutton/bigbluebutton/pull/23651",
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