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CVE-2020-27604

MEDIUM
6.5
CVSS Score
Published: October 21, 2020 at 02:09 PM UTC
Updated: June 17, 2026 at 03:09 AM UTC
1 product affected across 1 vendorBigbluebutton

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Severity
MEDIUM6.5
Exploit prediction
EPSS 1%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Bigbluebutton· Bigbluebutton
95%
v < 2.2.8
Affected range stops below 2.2.8, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

x_refsource_MISCProduct
Source: [email protected]
https://docs.bigbluebutton.org/dev/api.html
x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://www.golem.de/news/big-blue-button-das-grosse-blaue-sicherheitsrisiko-2010-151610.html

CVSS

6.5MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-116

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