CVE-2025-61601

HIGH

BigBlueButton < 3.0.13 - Authenticated Denial of Service via Polling Feature Choices Response

Title source: llm

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.

References (3)

Core 3

Core References

Exploit, Vendor Advisory x_refsource_confirm

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

Issue Tracking, Patch x_refsource_misc

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

Exploit x_refsource_misc

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

Scores

CVSS v3 7.5

EPSS 0.0043

EPSS Percentile 34.1%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation poc

Automatable yes

Technical Impact partial

Details

CWE

CWE-703

Status published

Products (1)

bigbluebutton/bigbluebutton < 3.0.13

Published Oct 09, 2025

Tracked Since Feb 18, 2026