Description
Open WebUI before 0.11.4 contains a stored cross-site scripting vulnerability in MarkdownInlineTokens.svelte, which renders markdown link URLs into anchor hrefs without validating their scheme. Authenticated users can embed javascript: links in shared chats that, when clicked by a victim, steal the victim's JWT from local storage, including admins' tokens.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| open-webui | open-webui | < 0.11.4 | 0.11.4 |
References
- GitHub Security Advisory (GHSA-wf9m-46cp-c6h6) vendor-advisory
- VulnCheck Advisory: Open WebUI before 0.11.4 Stored XSS via javascript: URLs in Markdown Links third-party-advisory