CVE-2022-29236

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.

• CWE-285

• 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

Published

Jun 2, 2022

Last Modified

Jun 17, 2026

Status

Modified

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