Server-Side Request Forgery (SSRF) in BigBlueButton - CVE-2023-33176

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Main Vulnerability Database Vulnerabilities #VU125908

Server-Side Request Forgery (SSRF) in BigBlueButton - CVE-2023-33176

Published: June 26, 2023 / Updated: April 14, 2026


Vulnerability identifier: #VU125908
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2023-33176
CWE-ID: CWE-918
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
BigBlueButton
Software vendor:
Blindside Networks

Description

The vulnerability allows a remote attacker to cause a denial of service and disclose sensitive information.

The vulnerability exists due to server-side request forgery in the insertDocument API request handling when downloading a presentation from a user-supplied URL. A remote attacker can supply a crafted URL to cause a denial of service and disclose sensitive information.

Exploitation requires knowledge of the API Secret Salt.


Remediation

Install security update from vendor's website.

External links