CVE-2021-29490

MEDIUM NUCLEI

jellyfin < 10.7.3 - Unauthenticated Server-Side Request Forgery via imageUrl Parameter

Title source: llm

Exploitation Summary

CVE-2021-29490 has a Nuclei detection template available — see the Nuclei card below for the Shodan/FOFA recon queries.

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.

Nuclei Templates (1)

Jellyfin 10.7.2 - Server Side Request Forgery

MEDIUMVERIFIEDby alph4byt3

Shodan: http.title:"Jellyfin"

FOFA: body="jellyfin"

References (1)

Core 1

Core References

Patch, Third Party Advisory x_refsource_confirm

https://github.com/jellyfin/jellyfin/security/advisories/GHSA-rgjw-4fwc-9v96

Scores

CVSS v3 5.8

EPSS 0.6986

EPSS Percentile 99.3%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

Details

CWE

CWE-918

Status published

Products (1)

jellyfin/jellyfin < 10.7.3

Published May 06, 2021

Tracked Since Feb 18, 2026