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CVE-2025-55207— @astrojs/node's trailing slash handling causes open redirect issue

Quick assessment

Affected
withastro astro
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Astro是Astro开源的一个内容驱动网站的 web 框架。 Astro 9.4.1之前版本存在输入验证错误漏洞，该漏洞源于重定向功能存在缺陷，可能导致开放重定向攻击。

AI Predicted 6.1 Difficulty: Trivial EPSS 0.57% · P45

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise
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I. Basic Information for CVE-2025-55207

Vulnerability Information
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Vulnerability Title
@astrojs/node's trailing slash handling causes open redirect issue
Source: CVE Program / CVE List V5
Vulnerability Description
Astro is a web framework for content-driven websites. Following CVE-2025-54793 there's still an Open Redirect vulnerability in a subset of Astro deployment scenarios prior to version 9.4.1. Astro 5.12.8 addressed CVE-2025-54793 where https://example.com//astro.build/press would redirect to the external origin //astro.build/press. However, with the Node deployment adapter in standalone mode and trailingSlash set to "always" in the Astro configuration, https://example.com//astro.build/press still redirects to //astro.build/press. This affects any user who clicks on a specially crafted link pointing to the affected domain. Since the domain appears legitimate, victims may be tricked into trusting the redirected page, leading to possible credential theft, malware distribution, or other phishing-related attacks. This issue has been patched in version 9.4.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Vulnerability Title
Astro 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Astro是Astro开源的一个内容驱动网站的 web 框架。 Astro 9.4.1之前版本存在输入验证错误漏洞，该漏洞源于重定向功能存在缺陷，可能导致开放重定向攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
withastro astro < 9.4.1 -

II. Public POCs for CVE-2025-55207

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III. Intelligence Information for CVE-2025-55207

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IV. Related Vulnerabilities

Same product: astro
Same vendor: withastro
Same weakness: CWE-601

V. Comments for CVE-2025-55207

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