What is CVE-2022-41961?

CVE-2022-41961 is a medium-severity vulnerability in Bigbluebutton, classified under Insufficient Verification of Data Authenticity. CVSS score: 4.3/10. Published 2022-12-16.

How severe is CVE-2022-41961?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Bigbluebutton

CVE-2022-41961

BigBlueButton is an open source web conferencing system. Versions prior to 2.4-rc-6 are subject to Ineffective user bans. The attacker could register multiple users, and join the meeting with one of them. When that user is banned, they could still join the meeting with the remaining registered users from the same extId. This issue has been fixed by improving permissions such that banning a user removes all users related to their extId, including registered users that have not joined the meeting. This issue is patched in versions 2.4-rc-6 and 2.5-alpha-1. There are no workarounds.

EPSS: 0.003 (20.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

Affected products

Bigbluebutton — versions < v2.4-rc-6, 2.4

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM, Patch, Third Party Advisory, Release Notes)
security-advisories@github.com (Third Party Advisory, x_refsource_MISC, Release Notes)
security-advisories@github.com (Third Party Advisory, x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2022-41961?: CVE-2022-41961 is a medium-severity vulnerability in Bigbluebutton, classified under Insufficient Verification of Data Authenticity. CVSS score: 4.3/10. Published 2022-12-16.
How severe is CVE-2022-41961?: Medium severity. CVSS v3 base score is 4.3 out of 10.