CVE-2022-29236

Name: CVE-2022-29236
Creator: NVD / NIST
Published: 2022-06-02T00:15:08.483+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.81%

Last modified Jun 17, 2026

CVE-2022-29236 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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 can circumvent access restrictions for drawing on the whiteboard. EPSS estimates a 0.81% chance of exploitation in the next 30 days.

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 can circumvent access restrictions for drawing on the whiteboard. The permission check is inadvertently skipped on the server, due to a previously introduced grace period. The attacker must be a meeting participant. The problem has been patched in versions 2.3.18 and 2.4-rc-6. There are currently no known workarounds.

Metrics

CVSS 3.1

4.3/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS Probability

0.81%

52.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-285

Affected Software

Vendor	Product	Versions	Update
Bigbluebutton	Bigbluebutton	>= 2.2.0, < 2.3.18	—
Bigbluebutton	Bigbluebutton	2.4	Alpha1

References

https://github.com/bigbluebutton/bigbluebutton/pull/13803Patch, Third Party Advisory
https://github.com/bigbluebutton/bigbluebutton/pull/14265Patch, Third Party Advisory
https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.3.18Release Notes, Third Party Advisory
https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.4-rc-6Release Notes, Third Party Advisory
https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-p93g-r9gm-9v6rPatch, Third Party Advisory
https://github.com/bigbluebutton/bigbluebutton/pull/13803Patch, Third Party Advisory
https://github.com/bigbluebutton/bigbluebutton/pull/14265Patch, Third Party Advisory
https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.3.18Release Notes, Third Party Advisory
https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.4-rc-6Release Notes, Third Party Advisory
https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-p93g-r9gm-9v6rPatch, Third Party Advisory

Timeline

Published: Jun 2, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-29236?

How severe is CVE-2022-29236?

CVE-2022-29236 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.81% probability of exploitation in the next 30 days.

How do I fix CVE-2022-29236?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-29236?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST