Open WebUI: Cross-origin postMessage confirmation bypass via action:submit

Summary The chat message listener allows non-same-origin input:prompt and action:submit messages, so an external site can set prompt text and trigger submitPrompt in an authenticated victim session. I validated this with a cross-origin attacker page that auto-posted messages and caused unauthoriz...

CVE-2026-27954

Live Helper Chat is an open-source application that enables live support websites. In versions up to and including 4.52, three chat action endpoints holdaction.php, blockuser.php, and transferchat.php load chat objects by ID without calling erLhcoreClassChat::hasAccessToRead, allowing operators t...