PatchTheCVECVE-2025-61601: BigBlueButton is an open-source virtual classroom
CVE-2025-61601 is a high-severity flaw (CVSS 7.5) affecting bigbluebutton. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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
Why this priority
- High severity
- Public exploit reference
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.5% (top 59%) |
| CISA exploited list | No |
| Weakness | CWE-703 |
| Published | 2025-10-09 |
| Last modified | 2026-10-19 |
Last updated 2026-10-19 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2025-61601?
bigbluebutton: upgrade to 3.0.13. Exact commands for each OS are on this page.
Is CVE-2025-61601 being exploited?
CVE-2025-61601 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2025-61601 affect?
CVE-2025-61601 affects bigbluebutton. Severity is high (CVSS 7.5). 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 ty
How urgent is CVE-2025-61601?
Priority 46/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action
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