What’s Vulnerable › Vulnerabilities

CVE-2022-29235: Limited data exposure for shared external videos in BigBlueButton

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-06-02 · updated 2026-06-17
• Weakness: CWE-200

Description

BigBlueButton is an open source web conferencing system. Starting in version 2.2 and prior to versions 2.3.18 and 2.4-rc-6, an attacker who is able to obtain the meeting identifier for a meeting on a server can find information related to an external video being shared, like the current timestamp and play/pause. The problem has been patched in versions 2.3.18 and 2.4-rc-6 by modifying the stream to send the data only for users in the meeting. There are currently no known workarounds.

Affected products

• bigbluebutton: from 2.2.0 before 2.3.18; 2.4-alpha1, 2.4-alpha2, 2.4-beta1, 2.4-beta2, 2.4-beta3, 2.4-beta4 (+4) — fixed in 2.3.18

How to fix

Upgrade to a fixed version: bigbluebutton 2.3.18. Check the vendor advisory for mitigations.

References

• https://github.com/bigbluebutton/bigbluebutton/pull/13788
• https://github.com/bigbluebutton/bigbluebutton/pull/14265
• https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.3.18
• https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.4-rc-6
• https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-x82p-j22f-v4q6
• https://github.com/bigbluebutton/bigbluebutton/pull/13788
• https://github.com/bigbluebutton/bigbluebutton/pull/14265
• https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.3.18
• https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.4-rc-6
• https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-x82p-j22f-v4q6

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