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Advisories

Nitter - Server-Side Request Forgery in /video Media Proxy Endpoint

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severity
high
date
Affecting

  • Nitter < commit 44b2f09

CWE
  • CWE-918 Server-Side Request Forgery (SSRF)
  • CWE-1188 Initialization of a Resource with an Insecure Default
CVSS
7.7
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:H/SI:N/SA:N
Credit
George Chen
Description
Nitter's /video media proxy endpoint fails to validate target URLs against Twitter/X domains and uses a hardcoded default HMAC key, allowing unauthenticated attackers to compute valid HMACs for arbitrary URLs. Attackers can retrieve HTTP responses from any host reachable by the server, including cloud metadata services and internal network resources.

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