HexBrain

Rocket.Chat · Report #3872858

Stored HTML Injection (CWE-79) via Livechat Visitor Name

Validstatus
lowseverity
15upvotes
20 Aug 2026disclosed

Summary

REST API endpoint POST /api/v1/livechat/visitor accepts an unauthenticated, unsanitized name field for Livechat visitors. This name is stored raw and later rendered via dangerouslySetInnerHTML in the Omnichannel Queue side panel (InquireSidePanelItem.tsx), injecting a real, clickable HTML link - pointing to any attacker-controlled domain, with arbitrary social-engineering text - into the DOM of any agent viewing the queue.

How it was found

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