CVSS Score of 10 (low)


Published Jun 26, 2023
Updated: Jul 5, 2023
CWE ID 918


CVE-2023-33176 is a vulnerability affecting BigBlueButton, an open-source virtual classroom platform. The vulnerability is classified as a Server-Side Request Forgery (SSRF). In affected versions of BigBlueButton, the user can supply a URL for presentation download without proper validation. To address this, an update has been made to validate all URLs used for presentation download. Administrators can define protocols and explicitly block hosts in the `` file. All URLs passed to the `insertDocument` API must adhere to these defined requirements and resolve to valid addresses. This vulnerability poses a medium risk with low integrity and confidentiality impacts, but no user interaction or privileges are required for exploitation.

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