Vulnerability Details : 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.
Products affected by CVE-2023-42803
- cpe:2.3:a:bigbluebutton:bigbluebutton:*:*:*:*:*:*:*:*
- cpe:2.3:a:bigbluebutton:bigbluebutton:2.6.0:alpha1:*:*:*:*:*:*
- cpe:2.3:a:bigbluebutton:bigbluebutton:2.6.0:alpha2:*:*:*:*:*:*
- cpe:2.3:a:bigbluebutton:bigbluebutton:2.6.0:alpha3:*:*:*:*:*:*
- cpe:2.3:a:bigbluebutton:bigbluebutton:2.6.0:alpha4:*:*:*:*:*:*
- cpe:2.3:a:bigbluebutton:bigbluebutton:2.6.0:beta1:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-42803
0.08%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 36 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-42803
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
8.8
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
2.8
|
5.9
|
NIST | |
5.3
|
MEDIUM | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.6
|
3.6
|
GitHub, Inc. |
CWE ids for CVE-2023-42803
-
The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.Assigned by: security-advisories@github.com (Primary)
References for CVE-2023-42803
-
https://github.com/bigbluebutton/bigbluebutton/pull/15990
fix (bbb-web): improvements on presentations upload by GuiLeme · Pull Request #15990 · bigbluebutton/bigbluebutton · GitHubThird Party Advisory
-
https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-w98f-6x8w-xhjc
Unrestricted File Upload · Advisory · bigbluebutton/bigbluebutton · GitHubThird Party Advisory
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