CVE-2023-42803

8.8 highEPSS 0.7%

High (8.8) in bigbluebutton bigbluebutton. EPSS 0.7% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

8.8 high

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

EPSS: 0.7% chance of exploitation in the next 30 days; higher than 51% of CVEs (scores of 2026-10-31)
CWE: CWE-434
Published: 2023-10-30
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

bigbluebutton:bigbluebutton

References

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

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