CVE-2025-64525 PoC — Astro: URL manipulation via unsanitized headers leads to path-based middleware protections bypass, potential SSRF/cache-

Title:Astro: URL manipulation via unsanitized headers leads to path-based middleware protections bypass, potential SSRF/cache-poisoning, CVE-2025-61925 bypass (CVE-2025-64525)
Description:Astro is a web framework. In Astro versions 2.16.0 up to but excluding 5.15.5 which utilizeon-demand rendering, request headers `x-forwarded-proto` and `x-forwarded-port` are insecurely used, without sanitization, to build the URL. This has several consequences, the most important of which are: middleware-based protected route bypass (only via `x-forwarded-proto`), DoS via cache poisoning (if a CDN is present), SSRF (only via `x-forwarded-proto`), URL pollution (potential SXSS, if a CDN is present), and WAF bypass. Version 5.15.5 contains a patch.

Astro 2.16.0 to 5.15.5 contains a broken access control caused by insecure use of unsanitized x-forwarded-proto and x-forwarded-port headers in URL building, letting attackers bypass middleware protection, cause DoS, SSRF, and URL pollution, exploit requires crafted headers.

 id: CVE-2025-64525

info:
  name: Astro - Broken Access Control
  author: zhero___,DhiyaneshDK
  sev

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