What’s Vulnerable › Vulnerabilities

CVE-2020-27602

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-09-29 · updated 2026-06-17
• Weakness: CWE-74

Description

BigBlueButton before 2.2.7 does not have a protection mechanism for separator injection in meetingId, userId, and authToken.

Affected products

• bigbluebutton: before 2.2.7 — fixed in 2.2.7

How to fix

Upgrade to a fixed version: bigbluebutton 2.2.7. Check the vendor advisory for mitigations.

References

• https://github.com/bigbluebutton/bigbluebutton/commit/4bfd924c64da2681f4c037026021f47eb189d717
• https://github.com/bigbluebutton/bigbluebutton/compare/v2.2.6...v2.2.7
• https://github.com/bigbluebutton/bigbluebutton/commit/4bfd924c64da2681f4c037026021f47eb189d717
• https://github.com/bigbluebutton/bigbluebutton/compare/v2.2.6...v2.2.7

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