Description
BigBlueButton is an open-source virtual classroom. Prior to 3.0.21, bbb-web generated conference sessionToken values with insufficiently secure randomness in bbb-common-web/src/main/java/org/bigbluebutton/api/Util.java and bigbluebutton-web/grails-app/controllers/org/bigbluebutton/web/controllers/ApiController.groovy, allowing a session user to predict other users- conference session tokens and impersonate them. This issue is fixed in version 3.0.21.
CVSS 8.1EPSS 0.258%Risk 0.83
View source- Published
- 2026-07-16 19:16:45
- Affected versions
- <3.0.21
- Type
- Web application
- Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N