Vulnerability · Published Nov 13, 2025 · Assigned by GitHub_M
CVE-2025-64525Astro: URL manipulation via unsanitized headers leads to path-based middleware protections bypass, potential SSRF/cache-poisoning, CVE-2025-61925 bypass
Medium 6.5
In plain English
A medium-severity server-side request forgery in astro from withastro. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 69% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei. Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | astro | 5.15.5 | GHSA-hr2q-hp5q-x767 |
Affected products (as reported)
Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
References
- https://github.com/withastro/astro/security/advisories/GHSA-hr2q-hp5q-x767 x_refsource_CONFIRM
- https://github.com/withastro/astro/commit/dafbb1ba29912099c4faff1440033edc768af8b4 x_refsource_MISC
- https://github.com/withastro/astro/blob/970ac0f51172e1e6bff4440516a851e725ac3097/packages/astro/src/core/app/node.ts#L121 x_refsource_MISC
- https://github.com/withastro/astro/blob/970ac0f51172e1e6bff4440516a851e725ac3097/packages/astro/src/core/app/node.ts#L97 x_refsource_MISC