SSRF in Bigbluebutton
CVE-2020-25820
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.105 (95.6th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 95.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.105 · newest: 0.105 · change: 0.000
Affected products
Weakness classification (CWE)
References
- www.redteam-pentesting.de/advisories/rt-sa-2020-005 (Third Party Advisory)
- www.golem.de/news/big-blue-button-das-grosse-blaue-sicherheitsrisiko-2010-15161… (Exploit, Third Party Advisory)
- packetstormsecurity.com/files/159667/BigBlueButton-2.2.25-File-Disclosure-Serve… (Exploit, Third Party Advisory)
- github.com/bigbluebutton/bigbluebutton/commit/71fe1eac1e5bd73a2cd44bd79c001086b… (Patch, Third Party Advisory)
- github.com/bigbluebutton/bigbluebutton/compare/v2.2.26...v2.2.27 (Third Party Advisory, Release Notes)
Frequently asked questions
- What is CVE-2020-25820?
- CVE-2020-25820 is a medium-severity vulnerability in Bigbluebutton, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.5/10. Published 2020-10-21.
- How severe is CVE-2020-25820?
- Medium severity. CVSS v3 base score is 6.5 out of 10.