Vulnerability · Published Oct 30, 2023 · Assigned by GitHub_M

CVE-2023-42803BigBlueButton Unrestricted File Upload vulnerability

Medium 5.3

In plain English

A medium-severity unrestricted file upload in bigbluebutton from bigbluebutton. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 52% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.7%top 48.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
bigbluebutton	bigbluebutton	< 2.6.0-beta.2

Weakness: CWE-434 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

References

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