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CVE-2021-29490 PoC — Unauthenticated GET requests through Remote Image endpoints

Source
https://github.com/Threekiii/Awesome-POC/blob/master/Web%E5%BA%94%E7%94%A8%E6%BC%8F%E6%B4%9E/Jellyfin%20RemoteImageController.cs%20SSRF%E6%BC%8F%E6%B4%9E%20CVE-2021-29490.md
Associated Vulnerability
Title:Unauthenticated GET requests through Remote Image endpoints (CVE-2021-29490)
Description:Jellyfin is a free software media system that provides media from a dedicated server to end-user devices via multiple apps. Verions prior to 10.7.3 vulnerable to unauthenticated Server-Side Request Forgery (SSRF) attacks via the imageUrl parameter. This issue potentially exposes both internal and external HTTP servers or other resources available via HTTP `GET` that are visible from the Jellyfin server. The vulnerability is patched in version 10.7.3. As a workaround, disable external access to the API endpoints `/Items/*/RemoteImages/Download`, `/Items/RemoteSearch/Image` and `/Images/Remote` via reverse proxy, or limit to known-friendly IPs.
File Snapshot

 # Jellyfin RemoteImageController.cs SSRF漏洞 CVE-2021-29490

## 漏洞描述

Jellyfin RemoteImageController.c

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