VULNERABILITY INTELLIGENCE
CVE-2026-46353
CVSS score8.1 HIGH
EPSS probability0.48%
CISA KEVNot currently listed
Published2026-07-16
Last modified2026-07-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
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.
Weakness classification
- security-advisories@github.com: CWE-284