CVE-2022-41961

MEDIUM
Published Dec 16, 20223y ago · Modified Jun 17, 20262w ago
4.3 CVSS 3.1
Medium
Find Similar
Published Dec 16, 2022 3y ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
4.3
Exploitability
2.8
Impact
1.4
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity Low
Availability None

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 2

CWE-345
CWE-346

Affected Products 11

VendorProductVersionRange
bigbluebuttonbigbluebutton* <2.4
bigbluebuttonbigbluebutton2.4any
bigbluebuttonbigbluebutton2.4any
bigbluebuttonbigbluebutton2.4any
bigbluebuttonbigbluebutton2.4any
bigbluebuttonbigbluebutton2.4any
bigbluebuttonbigbluebutton2.4any
bigbluebuttonbigbluebutton2.4any
bigbluebuttonbigbluebutton2.4any
bigbluebuttonbigbluebutton2.4any
bigbluebuttonbigbluebutton2.4any

References 3

  • github.com https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.4-rc-6
    Release NotesThird Party Advisory
  • github.com https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.5-alpha-1
    Release NotesThird Party Advisory
  • github.com https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-wxjp-h88g-7fqg
    PatchRelease NotesThird Party Advisory

Remediation

  • github.com https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-wxjp-h88g-7fqg
    PatchRelease NotesThird Party Advisory