Server-side Request Forgery (SSRF) Affecting astro package, versions <5.15.5
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-JS-ASTRO-13961342
- published14 Nov 2025
- disclosed13 Nov 2025
- creditcold-try
Introduced: 13 Nov 2025
CVE-2025-64525 (opens in a new tab)How to fix?
Upgrade astro to version 5.15.5 or higher.
Overview
astro is an Astro is a modern site builder with web best practices, performance, and DX front-of-mind.
Affected versions of this package are vulnerable to Server-side Request Forgery (SSRF) via the x-forwarded-proto and x-forwarded-port headers due to improper input sanitization when constructing URLs. An attacker can bypass path-based middleware protections, poison caches, or perform server-side requests by manipulating these headers.
Note:
This is also a bypass of the fix for CVE-2025-61925.