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.
Advisories
No advisories yet.
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Fri, 17 Jul 2026 17:30:00 +0000
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ssvc
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Thu, 16 Jul 2026 19:45:00 +0000
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| First Time appeared |
Bigbluebutton
Bigbluebutton bigbluebutton |
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| Vendors & Products |
Bigbluebutton
Bigbluebutton bigbluebutton |
Thu, 16 Jul 2026 18:30:00 +0000
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| 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. | |
| Title | BigBlueButton: Insecure Randomness allows to guess user's conference session token and impersonate them | |
| Weaknesses | CWE-330 | |
| References |
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| Metrics |
cvssV3_1
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Projects
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-07-17T13:59:11.141Z
Reserved: 2026-05-13T18:37:30.991Z
Link: CVE-2026-46351
Updated: 2026-07-17T13:59:06.373Z
No data.
No data.
OpenCVE Enrichment
Updated: 2026-07-24T06:00:04Z
Weaknesses