BigBlueButton before 2.2.27 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.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25820
Reference (s):
- http://packetstormsecurity.com/files/159667/BigBlueButton-2.2.25-File-Disclosure-Server-Side-Request-Forgery.html
- https://github.com/bigbluebutton/bigbluebutton/commit/71fe1eac1e5bd73a2cd44bd79c001086b250e435
- https://github.com/bigbluebutton/bigbluebutton/compare/v2.2.26 v2.2.27
- https://www.golem.de/news/big-blue-button-das-grosse-blaue-sicherheitsrisiko-2010-151610.html
- https://www.redteam-pentesting.de/advisories/rt-sa-2020-005