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CVE-2025-54793

CVE-2025-54793 · Astro: Duplicate trailing slash feature can lead to Open Redirects

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Astro is a web framework for content-driven websites. In versions 5.2.0 through 5.12.7, there is an Open Redirect vulnerability in the trailing slash redirection logic when handling paths with double slashes. This allows an attacker to redirect users to arbitrary external domains by crafting URLs such as https://mydomain.com//malicious-site.com/. This increases the risk of phishing and other social engineering attacks. This affects sites that use on-demand rendering (SSR) with the Node or Cloudflare adapters. It does not affect static sites, or sites deployed to Netlify or Vercel. This issue is fixed in version 5.12.8. To work around this issue at the network level, block outgoing redirect responses with a Location header value that starts with `//`.

CVSS 5.5 · Medium · EPSS 0.6% · Public exploit · Fix available

Published
Updated

Stack: node

Affected products and versions

  • astro

    Versions
    • >= 5.2.0, < 5.12.8: Affected

    No fix published

  • astro npm

    Affected ranges
    • SEMVER: ≥ 5.2.0, < 5.12.8

    Update to 5.12.8

Original sources

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