Vulnerability 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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Bigbluebutton | Bigbluebutton | < 3.0.13 |
Related Weaknesses (CWE)
References
- https://github.com/bigbluebutton/bigbluebutton/pull/23662Issue TrackingPatch
- https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-73j3-v3fExploitVendor Advisory
- https://www.youtube.com/watch?v=BwROSVIYjOYExploit
- https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-73j3-v3fExploitVendor Advisory
- https://www.youtube.com/watch?v=BwROSVIYjOYExploit
FAQ
What is CVE-2025-61601?
CVE-2025-61601 is a vulnerability with a CVSS score of 7.5 (HIGH). 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...
How severe is CVE-2025-61601?
CVE-2025-61601 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-61601?
Check the references section above for vendor advisories and patch information. Affected products include: Bigbluebutton Bigbluebutton.