Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') Affecting @astrojs/node package, versions <9.4.5
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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Test your applications- Snyk IDSNYK-JS-ASTROJSNODE-13535086
- published12 Oct 2025
- disclosed10 Oct 2025
- creditChris Graham
Introduced: 10 Oct 2025
NewCVE-2025-61925 (opens in a new tab)How to fix?
Upgrade @astrojs/node to version 9.4.5 or higher.
Overview
@astrojs/node is a Deploy your site to a Node.js server
Affected versions of this package are vulnerable to Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') via the X-Forwarded-Host header when using the Astro.url property without validation. An attacker can manipulate output content and potentially cause users to be redirected to malicious sites, allowing login credentials theft by sending crafted headers.
Note:
This is only exploitable if the application is deployed in on-demand/dynamic rendering mode.
In case of using a caching proxy, any page which is cached could persist the malicious value for subsequent users.