withastro up to 5.12.7 redirect

Summaryinfo

A vulnerability has been found in withastro astro up to 5.12.7 and classified as problematic. This affects an unknown function. The manipulation leads to redirect. This vulnerability is uniquely identified as CVE-2025-54793. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in withastro astro up to 5.12.7 and classified as problematic. This issue affects an unknown part. The manipulation with an unknown input leads to a redirect vulnerability. Using CWE to declare the problem leads to CWE-601. A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks. Impacted is confidentiality, and integrity. The summary by CVE is:

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 `//`.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2025-54793 since 07/29/2025. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1204.001 for this issue.

Upgrading to version 5.12.8 eliminates this vulnerability. Applying the patch 0567fb7b50c0c452be387dd7c7264b96bedab48f is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-23968). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• withastro

Name

• astro

Version

• 5.12.0
• 5.12.1
• 5.12.2
• 5.12.3
• 5.12.4
• 5.12.5
• 5.12.6
• 5.12.7

License

• open-source

Website

• Product: https://github.com/withastro/astro/

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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