CVE-2022-41961
The attacker could register multiple users, and join the meeting with one of them.
Does this matter?
Lower severity and a low EPSS score (0.28%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 4.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- EPSS
- 0.28% probability · 21th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-345, CWE-346
- Affected
- bigbluebutton/bigbluebutton
- Source
- security-advisories@github.com
References
- https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.4-rc-6Release Notes, Third Party Advisory
- https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.5-alpha-1Release Notes, Third Party Advisory
- https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-wxjp-h88g-7fqgPatch, Release Notes, Third Party Advisory
- https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.4-rc-6Release Notes, Third Party Advisory
- https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.5-alpha-1Release Notes, Third Party Advisory
- https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-wxjp-h88g-7fqgPatch, Release Notes, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.