CVE-2025-61601

BigBlueButton vulnerable to DoS via PollSubmitVote GraphQL mutation

Published: Oct 9, 2025Updated: Oct 20, 2025 Sources: CVE List NVDCWE-703

7.5HIGH

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 freeze or crash the entire server by abusing the polling feature's `Choices` response type. By submitting a malicious payload with a massive array in the `answerIds` field, the attacker can cause the current meeting — and potentially all meetings on the server — to become unresponsive. Version 3.0.13 contains a patch. No known workarounds are available.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:NConfidentiality

None

I:NIntegrity

None

A:HAvailability

High

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Weaknesses

CWE-703

Affected Products

bigbluebutton

oss-projectaka bbb

bigbluebuttonOn-premWeb App

Communications / video-conferencing

Exploitability

Official Patch Available

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References

https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-73j3-v3fq-fqx5

github.com

https://github.com/bigbluebutton/bigbluebutton/pull/23662

github.com

https://www.youtube.com/watch?v=BwROSVIYjOY

youtube.com

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