Open Redirect Vulnerability in Astro Web Framework by WithAstro
CVE-2025-55207

5.5MEDIUM

Key Information:

Vendor

Withastro

Status
Astro
Vendor
CVE Published:
15 August 2025

What is CVE-2025-55207?

The Astro web framework exhibits an Open Redirect vulnerability in specific deployment scenarios prior to version 9.4.1. Despite previous patching efforts addressing related vulnerabilities, the issue persists when using the Node deployment adapter in standalone mode with the trailingSlash parameter set to 'always'. This flaw can lead users to be redirected to external domains by clicking specially crafted links, which can result in credential theft, malware distribution, or phishing attacks. The vulnerability has been remedied in version 9.4.1.

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Deploy the Patch

Affected Version(s)

astro < 9.4.1

References

https://github.com/withastro/astro/security/advisories/GH...
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https://github.com/withastro/astro/commit/5fc3c599cacb017...
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CVSS V4

Score:
5.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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