CVE-2023-42803

BigBlueButton Unrestricted File Upload vulnerability

CVSS 5.3 MEDIUMEPSS 0.5%CWE-434

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.3EPSS 0.5%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

30 Oct 2023Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

bigbluebutton · bigbluebutton

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References

https://github.com/bigbluebutton/bigbluebutton/pull/15990 https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-w98f-6x8w-xhjc