PT-2026-73251

Discourse is an open-source discussion platform. Prior to 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0, plugins/chat/lib/chat/onebox handler.rb resolves Chat::Thread by route thread id independently of the route channel id before checking whether the user can preview the selected chat channel. An...

EUVD-2026-55663

Discourse is an open-source discussion platform. Prior to 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0, plugins/chat/lib/chat/oneboxhandler.rb resolves Chat::Thread by route threadid independently of the route channelid before checking whether the user can preview the selected chat channel. An...

CVE-2026-72724: Authorization Bypass Through User-Controlled Key

Discourse is an open-source discussion platform. Prior to 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0, plugins/chat/lib/chat/oneboxhandler.rb resolves Chat::Thread by route threadid independently of the route channelid before checking whether the user can preview the selected chat channel. An...

CVE-2026-48811 FreeScout: Thread Deletion Bypasses Mailbox Access Revocation

FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to 1.8.221, FreeScout allows a non-admin user to permanently delete an internal note private thread from any conversation, even after that user's access to the mailbox containing the conversation has been...

CVE-2026-5163

Mattermost 11.5.x prior to 11.5.2 (up to 11.5.1 affected) fails to verify channel membership when processing AI-assisted message rewrites, allowing an authenticated user to read content from threads in private channels and direct messages they should not access via a crafted request to the post r...

CVE-2026-5163 Missing authorization check in AI message rewrite endpoint allows access to private thread content

Mattermost versions 11.5.x = 11.5.1 fail to verify channel membership when processing AI-assisted message rewrites which allows an authenticated attacker to read the content of threads in private channels and direct messages they do not have access to via a crafted request to the post rewrite...

Information disclosure

A information disclosure vulnerability exists in Rockert.Chat v5 due to /api/v1/chat.getThreadsList lack of sanitization of user inputs and can therefore leak private thread messages to unauthorized users via Mongo DB injection...

APBoard 2.0 2 - Unauthorized Thread Reading

APBoard 2.0 2 - Unauthorized Thread Reading source: https://www.securityfocus.com/bid/6330/info A vulnerability has been reported for APBoard that may allow unauthorized users to read postings in internal forums. The vulnerability is a result of the 'useraction.php' script failing to properly che...