Description
Deep Chat through 2.5.1 contains a cross-site scripting vulnerability that allows attackers to inject javascript: links because RemarkableConfig.createNew disables Remarkable link validation. Attackers can place crafted Markdown links in AI responses, addMessage content, or loaded history to execute script in the embedding page when victims click them.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OvidijusParsiunas | Deep Chat | 1.4.7 – ≤ 2.5.1 | — |
References
- https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/ovidijusparsiunas-deep-chat-markdown-scheme-validation third-party-advisory
- https://github.com/OvidijusParsiunas/deep-chat/blob/2.5.1/component/src/views/chat/messages/remarkable/remarkableConfig.ts#L74-L78 technical-description
- https://github.com/OvidijusParsiunas/deep-chat product
- VulnCheck Advisory: Deep Chat through 2.5.1 XSS via Markdown Link Validation Bypass third-party-advisory