Path Traversal in Bigbluebutton
CVE-2023-42804
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (37.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Bigbluebutton — versions 2.6.0, < 2.6.0-beta.1
Weakness classification (CWE)
References
- github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-3qjg-229m-vq84 (Third Party Advisory)
- github.com/bigbluebutton/bigbluebutton/pull/15960 (Third Party Advisory)
Frequently asked questions
- What is CVE-2023-42804?
- CVE-2023-42804 is a low-severity vulnerability in Bigbluebutton, classified under Path Traversal. CVSS score: 3.1/10. Published 2023-10-30.
- How severe is CVE-2023-42804?
- Low severity. CVSS v3 base score is 3.1 out of 10.