What’s Vulnerable › Vulnerabilities

CVE-2022-41963: BigBlueButton contains Improper Preservation of Permissions for whiteboard

• Severity: low (CVSS 3.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-12-16 · updated 2026-06-17
• Weakness: CWE-281

Description

BigBlueButton is an open source web conferencing system. Versions prior to 2.4.3 contain a whiteboard grace period that exists to handle delayed messages, but this grace period could be used by attackers to take actions in the few seconds after their access is revoked. The attacker must be a meeting participant. This issue is patched in version 2.4.3 an version 2.5-alpha-1

Affected products

• bigbluebutton: before 2.4.3 — fixed in 2.4.3

How to fix

Upgrade to a fixed version: bigbluebutton 2.4.3. Check the vendor advisory for mitigations.

References

• https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.4.3
• https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-v6p9-926c-6qfp
• https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.4.3
• https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-v6p9-926c-6qfp

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