What is CVE-2020-27604?

CVE-2020-27604 is a medium-severity vulnerability in Bigbluebutton, classified under Improper Encoding or Escaping of Output. CVSS score: 6.5/10. Published 2020-10-21.

How severe is CVE-2020-27604?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Bigbluebutton

CVE-2020-27604

BigBlueButton before 2.3 does not implement LibreOffice sandboxing. This might make it easier for remote authenticated users to read the API shared secret in the bigbluebutton.properties file. With the API shared secret, an attacker can (for example) use api/join to join an arbitrary meeting regardless of its guestPolicy setting.

EPSS: 0.011 (63.5th percentile) — read the EPSS interpretation.

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.

Affected products

Bigbluebutton
N/a — versions n/a

Weakness classification (CWE)

CWE-116 — Improper Encoding or Escaping of Output

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)
cve@mitre.org (Product, x_refsource_MISC)

Frequently asked questions

What is CVE-2020-27604?: CVE-2020-27604 is a medium-severity vulnerability in Bigbluebutton, classified under Improper Encoding or Escaping of Output. CVSS score: 6.5/10. Published 2020-10-21.
How severe is CVE-2020-27604?: Medium severity. CVSS v3 base score is 6.5 out of 10.