CyberRota Analysis
AI-GeneratedComfyUI versions prior to 0.28.0 are vulnerable to stored cross-site scripting (XSS) due to improper handling of user-uploaded HTML and SVG files, which can lead to the execution of malicious scripts in the user's browser. This vulnerability can expose sensitive information, including API tokens and user settings, to attackers. Organizations using ComfyUI should prioritize upgrading to version 0.28.0 to mitigate the risk of exploitation.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
ComfyUI is a node-based diffusion model GUI, API, and backend. Prior to 0.28.0, GET /userdata/{file} served user-controlled HTML and SVG files with extension-derived content types, allowing stored cross-site scripting in the ComfyUI origin and access to browser-stored API tokens, settings, workflows, and authenticated-equivalent API calls. The handler used web.FileResponse(path), so an uploaded .html/.svg was served as text/html/image/svg+xml. POST /userdata stores arbitrary request bodies (confined to the user's userdata directory). When a victim navigated to the file URL, the embedded script executed same-origin. The /view endpoint already forced dangerous MIME types to download; that protection had never been applied to /userdata. This issue is fixed in version 0.28.0.