CVE-2022-41963Network attack vector

Whiteboard modification via post-revocation grace period

Published Dec 16, 2022 · Updated Apr 17, 2025

Authorization failure in BigBlueButton before 2.4.3 allows remote authenticated users to modify a meeting whiteboard after access is revoked. The bbb-apps-akka whiteboard message path preserves a short grace period and accepts action messages for several seconds after permission withdrawal. A meeting participant must first hold whiteboard access; exploitation changes whiteboard content only during the post-revocation window.

CVSS severity2.7
Low
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization failure in BigBlueButton before 2.4.3 allows remote authenticated users to modify a meeting whiteboard after access is revoked. The bbb-apps-akka whiteboard message path preserves a short grace period and accepts action messages for several seconds after permission withdrawal. A meeting participant must first hold whiteboard access; exploitation changes whiteboard content only during the post-revocation window.

The record

CVE
CVE-2022-41963
Published
Dec 16, 2022
Updated
Apr 17, 2025
Vendor
BigBlueButton Inc.
Product
BigBlueButton
Classifications
CWE-281, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 16, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 17, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.4.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

BigBlueButton Inc. · BigBlueButtonversion=< 2.4.3

Published CVSS scores

3.1NIST NVDCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
2.7GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-281Improper Preservation of Permissions
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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