CVE-2022-29234— Grace period for lock settings in public/private chats in BigBlueButton
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I. Basic Information for CVE-2022-29234
Vulnerability Information
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Vulnerability Title
Grace period for lock settings in public/private chats in BigBlueButton
Source: NVD (National Vulnerability Database)
Vulnerability Description
BigBlueButton is an open source web conferencing system. Starting in version 2.2 and prior to versions 2.3.18 and 2.4.1, an attacker could send messages to a locked chat within a grace period of 5s any lock setting in the meeting was changed. The attacker needs to be a participant in the meeting. Versions 2.3.18 and 2.4.1 contain a patch for this issue. There are currently no known workarounds.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
BigBlueButton 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
BigBlueButton是BigBlueButton社区的一套开源的Web会议系统。 BigBlueButton 2.2 到 2.3.18 和 2.4.1 版本存在授权问题漏洞，攻击者利用该漏洞可以在锁定设置生效后 5 秒的宽限期内向锁定的聊天发送消息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| bigbluebutton | bigbluebutton | >= 2.2, < 2.3.18 | - |
II. Public POCs for CVE-2022-29234
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://github.com/bigbluebutton/bigbluebutton/pull/14265x_refsource_MISC
- https://github.com/bigbluebutton/bigbluebutton/pull/13850x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2022-29234
Same Patch Batch · bigbluebutton · 2022-06-01 · 6 CVEs total
| CVE-2022-29169 | 7.5 HIGH | ReDoS on endpoint html5client/useragent in BigBlueButton |
| CVE-2022-29232 | 6.5 MEDIUM | Exposure of messages in BigBlueButton public chats |
| CVE-2022-29235 | 5.3 MEDIUM | Limited data exposure for shared external videos in BigBlueButton |
| CVE-2022-29233 | 4.3 MEDIUM | Improper access control for breakout rooms in BigBlue Button |
| CVE-2022-29236 | 4.3 MEDIUM | Improper access control for pencil annotations in BigBlueButton |
IV. Related Vulnerabilities
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BigBlueButton: Audio from participants to the server initial - CVE-2026-27466
BigBlueButton: Exposed ClamAV port enables Denial of Service
Same vendor: bigbluebutton
- CVE-2026-41127
BigBlueButton's missing authorization allows viewer to injec - CVE-2026-41126
BigBlueButton has Open Redirect through bigbluebutton/api/jo - CVE-2026-27736
BigBlueButton has Open Redirect vulnerability in ApiControll - CVE-2026-27467
BigBlueButton: Audio from participants to the server initial - CVE-2026-27466
BigBlueButton: Exposed ClamAV port enables Denial of Service
Same weakness: CWE-285
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