What is CVE-2023-42803?

CVE-2023-42803 is a medium-severity vulnerability in Bigbluebutton, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 5.3/10. Published 2023-10-30.

How severe is CVE-2023-42803?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Arbitrary file upload in Bigbluebutton

CVE-2023-42803

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.

Vulnerability class: Unrestricted File Upload

EPSS: 0.005 (42.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Bigbluebutton — versions 2.6.0, < 2.6.0-beta.2

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
security-advisories@github.com (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2023-42803?: CVE-2023-42803 is a medium-severity vulnerability in Bigbluebutton, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 5.3/10. Published 2023-10-30.
How severe is CVE-2023-42803?: Medium severity. CVSS v3 base score is 5.3 out of 10.