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CVE-2023-42804 Details

Description

BigBlueButton is an open-source virtual classroom. BigBlueButton prior to version 2.6.0-beta.1 has a path traversal vulnerability that allows an attacker with a valid starting folder path, to traverse and read other files without authentication, assuming the files have certain extensions (txt, swf, svg, png). In version 2.6.0-beta.1, input validation was added on the parameters being passed and dangerous characters are stripped. There are no known workarounds.

Metrics

CVSS 3.x Severity and Vector Strings:

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

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

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/bigbluebutton/bigbluebutton/pull/15960	CVE	Third Party Advisory
https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-3qjg-229m-vq84	CVE	Third Party Advisory
https://github.com/bigbluebutton/bigbluebutton/pull/15960	[email protected]	Third Party Advisory
https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-3qjg-229m-vq84	[email protected]	Third Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-22	Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')	[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:::::: 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]