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CVE-2023-42803 Details

Description

BigBlueButton is an open-source virtual classroom. BigBlueButton prior to version 2.6.0-beta.2 is vulnerable to unrestricted file upload, where the insertDocument API call does not validate the given file extension before saving the file, and does not remove it in case of validation failures. BigBlueButton 2.6.0-beta.2 contains a patch. There are no known workarounds.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:8.8 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CNA: [email protected]CVSS-B:5.3 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/bigbluebutton/bigbluebutton/pull/15990	CVE	Third Party Advisory
https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-w98f-6x8w-xhjc	CVE	Third Party Advisory
https://github.com/bigbluebutton/bigbluebutton/pull/15990	[email protected]	Third Party Advisory
https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-w98f-6x8w-xhjc	[email protected]	Third Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-434	Unrestricted Upload of File with Dangerous Type	[email protected]

Affected Products

Product	Versions
bigbluebutton bigbluebutton	<= 2.5.18 2.6.0 alpha1 2.6.0 alpha2 2.6.0 alpha3 2.6.0 alpha4
CPE cpe:2.3:a:bigbluebutton:bigbluebutton:::::::: cpe:2.3:a:bigbluebutton:bigbluebutton:2.6.0:alpha1:::::: cpe:2.3:a:bigbluebutton:bigbluebutton:2.6.0:alpha2:::::: cpe:2.3:a:bigbluebutton:bigbluebutton:2.6.0:alpha3:::::: cpe:2.3:a:bigbluebutton:bigbluebutton:2.6.0:alpha4:::::: cpe:2.3:a:bigbluebutton:bigbluebutton:2.6.0:beta1:::::: Remediation No remediation found in references.

Product

Versions

bigbluebutton bigbluebutton

<= 2.5.18

2.6.0 alpha1

2.6.0 alpha2

2.6.0 alpha3

2.6.0 alpha4

CPE

cpe:2.3:a:bigbluebutton:bigbluebutton:*:*:*:*:*:*:*:*
cpe:2.3:a:bigbluebutton:bigbluebutton:2.6.0:alpha1:*:*:*:*:*:*
cpe:2.3:a:bigbluebutton:bigbluebutton:2.6.0:alpha2:*:*:*:*:*:*
cpe:2.3:a:bigbluebutton:bigbluebutton:2.6.0:alpha3:*:*:*:*:*:*
cpe:2.3:a:bigbluebutton:bigbluebutton:2.6.0:alpha4:*:*:*:*:*:*
cpe:2.3:a:bigbluebutton:bigbluebutton:2.6.0:beta1:*:*:*:*:*:*

Remediation

No remediation found in references.

Change History

5 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Nov 7, 2023	Initial Analysis	[email protected]