CVE-2025-61601
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.47%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.47% probability · 39th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-703
- Affected
- bigbluebutton/bigbluebutton
- Source
- security-advisories@github.com
References
- https://github.com/bigbluebutton/bigbluebutton/pull/23662Issue Tracking, Patch
- https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-73j3-v3fq-fqx5Exploit, Vendor Advisory
- https://www.youtube.com/watch?v=BwROSVIYjOYExploit
- https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-73j3-v3fq-fqx5Exploit, Vendor Advisory
- https://www.youtube.com/watch?v=BwROSVIYjOYExploit
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.