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CVE-2026-46353

HIGH
8.1
CVSS 3.1
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.

Metadata

CVE ID
CVE-2026-46353
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-05-13 18:37 UTC
Published
2026-07-16 18:06 UTC
Last updated
2026-07-16 18:41 UTC
Primary CWE
CWE-284
CWE-284: Improper Access Control
Vendor / Product
bigbluebutton / bigbluebutton
Sources
cve.org  ·  NVD

Severity & Metrics

8.1 HIGH CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
SSVC — CISA Coordinator
Exploitation
none
Automatable
no
Tech. Impact
total
Affected products (1)
VendorProductPlatformVersions
bigbluebutton bigbluebutton — < 3.0.21
Weakness (CWE)
CWESourceDescription
CWE-284 cna CWE-284: Improper Access Control
CVSS scores (1)
ScoreSeverityVersionSourceVector
8.1 HIGH 3.1 cna CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
References (3)
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