CVE-2023-42804

low-risk
Published 2023-10-30

BigBlueButton is an open-source virtual classroom. BigBlueButton prior to version 2.6.0-beta.1 has a path traversal vulnerability that allows an attacker with a valid starting folder path, to traverse and read other files without authentication, assuming the files have certain extensions (txt, swf, svg, png). In version 2.6.0-beta.1, input validation was added on the parameters being passed and dangerous characters are stripped. There are no known workarounds.

Do I need to act?

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0.24% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
3
CVSS 3.1/10 Low
NETWORK / HIGH complexity

Affected Products (5)

Affected Vendors

Bigbluebutton

References (4)

Third Party Advisory https://github.com/bigbluebutton/bigbluebutton/pull/15960
Third Party Advisory https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-3qjg-229...
Third Party Advisory https://github.com/bigbluebutton/bigbluebutton/pull/15960
Third Party Advisory https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-3qjg-229...
24
/ 100
low-risk
Severity 11/34 · Low
Exploitability 1/34 · Minimal
Exposure 12/34 · Low