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CVE-2020-25820

MediumPublished

BigBlueButton before 2.2.7 allows remote authenticated users to read local files and conduct SSRF attacks via an uploaded Office document that has a crafted...

Published: Oct 21, 2020
Updated: Aug 4, 2024
Assigning CNA: mitre
Evidence observed: Nov 18, 2020

Primary CVSS

6.5/ 10Medium

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS probability estimate

10.5%

Moderate · next 30 days

Percentile: 95.6%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

BigBlueButton before 2.2.7 allows remote authenticated users to read local files and conduct SSRF attacks via an uploaded Office document that has a crafted URL in an ODF xlink field.

Sources

BigBlueButton 2.2.25 - Arbitrary File Disclosure and Server-Side Request ForgeryExploit
RedTeam Pentesting GmbH · multiple · Nov 18, 2020

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