CVE-2026-41127CWE-639

BigBlueButton's missing authorization allows viewer to inject/overwrite captions

Medium · published April 21, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
21.5
In the wild
Unconfirmed
What it is

BigBlueButton is an open-source virtual classroom. Versions prior to 3.0.24 have a missing authorization that allows viewers to inject/overwrite captions Version 3.0.24 tightened the permissions on who is able to submit captions. No known workarounds are available.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00299 · 21.5th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-04-21T23:24Z
EPSS history
Timeline
  • 21 APR 23:24Z
    BigBlueButton's missing authorization allows viewer to inject/overwrite captions
    cvelistv5