CVE-2023-42804

BigBlueButton Path Traversal – Reading Certain File Extensions

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.

Category

3.1
CVSS
Severity: Low
CVSS 3.1 •
EPSS 0.32%
Third-Party Advisory github.com Third-Party Advisory github.com
Affected: bigbluebutton bigbluebutton
Published at:
Updated at:

References

Link Tags
https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-3qjg-229m-vq84 third party advisory
https://github.com/bigbluebutton/bigbluebutton/pull/15960 third party advisory

Frequently Asked Questions

What is the severity of CVE-2023-42804?
CVE-2023-42804 has been scored as a low severity vulnerability.
How to fix CVE-2023-42804?
To fix CVE-2023-42804, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-42804 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-42804 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-42804?
CVE-2023-42804 affects bigbluebutton bigbluebutton.
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