Published: 21/10/2020 Updated: 29/10/2020

CVSS v2 Base Score: 4 | Impact Score: 2.9 | Exploitability Score: 8

CVSS v3 Base Score: 6.5 | Impact Score: 3.6 | Exploitability Score: 2.8

VMScore: 356

Vector: AV:N/AC:L/Au:S/C:P/I:N/A:N

BigBlueButton prior to 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.

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RedTeam Pentesting discovered a vulnerability in the BigBlueButton web conferencing system version 2225 that allows participants of a conference with permissions to upload presentations to read arbitrary files from the file system and perform server-side requests This leads to administrative access to the BigBlueButton instance ...

Full Disclosure mailing list archives   By Date By Thread </form>    [RT-SA-2020-005] Arbitrary File Disclosure and Server-Side Request Forgery in BigBlueButton <!--X-Subject-Header-End-- ...

CWE-918 https://www.redteam-pentesting.de/advisories/rt-sa-2020-005 https://www.golem.de/news/big-blue-button-das-grosse-blaue-sicherheitsrisiko-2010-151610.html http://packetstormsecurity.com/files/159667/BigBlueButton-2.2.25-File-Disclosure-Server-Side-Request-Forgery.html https://github.com/bigbluebutton/bigbluebutton/compare/v2.2.26...v2.2.27 https://github.com/bigbluebutton/bigbluebutton/commit/71fe1eac1e5bd73a2cd44bd79c001086b250e435 https://nvd.nist.gov http://seclists.org/fulldisclosure/2020/Oct/26

CVE-2020-25820

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