CVE-2022-41961CWE-345CWE-346

BigBlueButton subject to Ineffective user bans

Medium · published December 16, 2022

CVSS v3.1
4.3
EPSS
0%
Percentile
22.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00304 · 22.0th percentile
Weaknesses
CWE-345 · Insufficient Verification of Data Authenticity; CWE-346 · Origin Validation Error
Published
2022-12-16T12:24Z
EPSS history
Timeline
  • 16 DEC 12:24Z
    BigBlueButton subject to Ineffective user bans
    cvelistv5