CVE-2025-61601

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.

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

• Bigbluebutton (Bigbluebutton)

References

• https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-73j3-v3fq-fqx5
• https://github.com/bigbluebutton/bigbluebutton/pull/23662
• https://www.youtube.com/watch?v=BwROSVIYjOY