CVE-2025-64525: Astro

Medium severity, CVSS 6.5. EPSS: 1.2% chance of exploitation in the next 30 days.

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.

Affected products

• Astro Astro: from 2.16.0, before 5.15.5 (fixed in 5.15.5)

Published 2025-11-13. Last modified 2026-10-07.