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Vulnerability Intelligence

CVE-2025-61602 | Mondoo Vulnerability Intelligence

CVE-2025-61602

HIGH7.5

BigBlueButton vulnerable to Chat DoS via invalid reactionEmojiId

Published Oct 9, 2025

Modified 3 months ago

No fix available

Details

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.

References

WEBhttps://github.com/bigbluebutton/bigbluebutton/pull/23651 DETECTIONhttps://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-45j2-m26c-3pcm ADVISORYhttps://www.cve.org/CVERecord?id=CVE-2025-61602

CVSS Analysis

CVSS v3.1

7.5

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Scope

Scope

UnchangedS:U

Impact

Confidentiality

NoneC:N

Integrity

NoneI:N

Availability

HighA:H

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

Weakness Type (CWE)

Other

Ecosystems

Timeline

PublishedOct 9, 2025

ModifiedOct 10, 2025