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

Quick assessment

Affected
jellyfin jellyfin
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Jellyfin是一个免费软件媒体系统。可让您控制媒体的管理和流式传输。它是专有Emby和Plex的替代产品，可以通过多个应用程序将专用服务器中的媒体提供给最终用户设备。 Jellyfin 10.7.3之前的版本存在代码问题漏洞，该漏洞可能会暴露内部和外部的HTTP服务器，或者其他通过HTTP GET 从Jellyfin服务器看到的资源。

CVSS 5.8 · Medium EPSS 69.86% · P99

Public Exploits 1

Nuclei · 1 CVE-2021-29490.yaml [template]
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I. Basic Information for CVE-2021-29490

Vulnerability Information
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Vulnerability Title
Unauthenticated GET requests through Remote Image endpoints
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
Jellyfin 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Jellyfin是一个免费软件媒体系统。可让您控制媒体的管理和流式传输。它是专有Emby和Plex的替代产品，可以通过多个应用程序将专用服务器中的媒体提供给最终用户设备。 Jellyfin 10.7.3之前的版本存在代码问题漏洞，该漏洞可能会暴露内部和外部的HTTP服务器，或者其他通过HTTP GET 从Jellyfin服务器看到的资源。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
jellyfin jellyfin <= 10.7.2 -

II. Public POCs for CVE-2021-29490

# POC Description Source Link Shenlong Link
1 Jellyfin is a free software media system. Versions 10.7.2 and below are vulnerable to unauthenticated Server-Side Request Forgery (SSRF) attacks via the imageUrl parameter. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-29490.yaml POC Details
2 None 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 POC Details
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III. Intelligence Information for CVE-2021-29490

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Vendor Advisories for CVE-2021-29490 (1)

IV. Related Vulnerabilities

Same product: jellyfin
Same vendor: jellyfin
Same weakness: CWE-918