Show plain JSON{"containers": {"cna": {"affected": [{"product": "bigbluebutton", "vendor": "bigbluebutton", "versions": [{"status": "affected", "version": ">= 2.2, < 2.3.9"}, {"status": "affected", "version": ">= 2.4-alpha-1, < 2.4-beta-1"}]}], "descriptions": [{"lang": "en", "value": "BigBlueButton is an open source web conferencing system. Starting with version 2.2 and prior to versions 2.3.9 and 2.4-beta-1, an attacker can circumvent access controls to obtain the content of public chat messages from different meetings on the server. The attacker must be a participant in a meeting on the server. BigBlueButton versions 2.3.9 and 2.4-beta-1 contain a patch for this issue. 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