SSRF in Bigbluebutton
CVE-2023-43798
BigBlueButton is an open-source virtual classroom. BigBlueButton prior to versions 2.6.12 and 2.7.0-rc.1 is vulnerable to Server-Side Request Forgery (SSRF). This issue is a bypass of CVE-2023-33176. A patch in versions 2.6.12 and 2.7.0-rc.1 disabled follow redirect at `httpclient.execute` since the software no longer has to follow it when using `finalUrl`. There are no known workarounds. We recommend upgrading to a patched version of BigBlueButton.
Vulnerability class: SSRF (Server-Side Request Forgery)
EPSS: 0.004 (34.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.6 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Bigbluebutton — versions < 2.6.12, >= 2.7.0-alpha.1, < 2.7.0-rc.1, 2.7.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
- security-advisories@github.com (Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2023-43798?
- CVE-2023-43798 is a medium-severity vulnerability in Bigbluebutton, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.6/10. Published 2023-10-30.
- How severe is CVE-2023-43798?
- Medium severity. CVSS v3 base score is 5.6 out of 10.