CVE-2023-43798: BigBlueButton Blind SSRF When Uploading Presentation (mitigation bypass)
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.
Affected Software
Event History
Frequently Asked Questions
What is CVE-2023-43798?
CVE-2023-43798 is a vulnerability in BigBlueButton that allows for Server-Side Request Forgery (SSRF) when uploading a presentation.
What is the severity of CVE-2023-43798?
The severity of CVE-2023-43798 is medium with a CVSS score of 5.6.
How does CVE-2023-43798 affect BigBlueButton?
CVE-2023-43798 affects BigBlueButton versions prior to 2.6.12 and 2.7.0-rc.1.
Is there a patch available for CVE-2023-43798?
Yes, a patch is available in BigBlueButton versions 2.6.12 and 2.7.0-rc.1.
How can I mitigate CVE-2023-43798?
To mitigate CVE-2023-43798, make sure to update your BigBlueButton installation to versions 2.6.12 or 2.7.0-rc.1.