CVE-2023-42804

MediumCVSS 5.3/10Last modified Jun 17, 2026

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 3.1 5.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Weakness enumeration

CWE-22

Affected software

Vendor	Product	Versions
bigbluebutton	bigbluebutton	< 2.6.0-beta.1

References

https://github.com/bigbluebutton/bigbluebutton/pull/15960Third Party Advisory
https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-3qjg-229m-vq84Third Party Advisory
https://github.com/bigbluebutton/bigbluebutton/pull/15960Third Party Advisory
https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-3qjg-229m-vq84Third Party Advisory

Timeline

Published: Oct 30, 2023
Last modified: Jun 17, 2026
NVD status: Modified

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