BigBlueButton is an open-source virtual classroom. Prior to 3.0.21, bbb-web checksum validation could be bypassed when a presentationUploadExternalUrl parameter was supplied to API request handling in CreateMeeting.java and ValidationService.java, allowing a user to send valid requests to some endpoints without a checksum. This issue is fixed in version 3.0.21.
Advisories
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Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
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 19:30:00 +0000
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| Metrics |
ssvc
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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 checksum validation could be bypassed when a presentationUploadExternalUrl parameter was supplied to API request handling in CreateMeeting.java and ValidationService.java, allowing a user to send valid requests to some endpoints without a checksum. This issue is fixed in version 3.0.21. | |
| Title | BigBlueButton API checksum bypass via presentationUploadExternalUrl | |
| Weaknesses | CWE-284 | |
| References |
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| Metrics |
cvssV3_1
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Projects
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-07-16T18:41:31.957Z
Reserved: 2026-05-13T18:37:30.991Z
Link: CVE-2026-46353
Updated: 2026-07-16T18:41:26.755Z
No data.
No data.
OpenCVE Enrichment
Updated: 2026-07-16T19:30:05Z
Weaknesses