CVE-2025-59837
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-10-28

Last updated on: 2025-11-25

Assigner: GitHub, Inc.

Description
Astro is a web framework that includes an image proxy. In versions 5.13.4 and later before 5.13.10, the image proxy domain validation can be bypassed by using backslashes in the href parameter, allowing server-side requests to arbitrary URLs. This can lead to server-side request forgery (SSRF) and potentially cross-site scripting (XSS). This vulnerability exists due to an incomplete fix for CVE-2025-58179. Fixed in 5.13.10.
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Meta Information
Published
2025-10-28
Last Modified
2025-11-25
Generated
2026-06-16
AI Q&A
2025-10-28
EPSS Evaluated
2026-06-15
NVD
CVE-2025-59837
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
astro astro From 5.13.4 (inc) to 5.13.10 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CWE-918 The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.
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Executive Summary

This vulnerability exists in the Astro web framework's image proxy component in versions 5.13.4 up to before 5.13.10. It allows an attacker to bypass domain validation by using backslashes in the href parameter, which can cause the server to make requests to arbitrary URLs. This can lead to server-side request forgery (SSRF) and potentially cross-site scripting (XSS). The issue is due to an incomplete fix of a previous vulnerability (CVE-2025-58179) and was fixed in version 5.13.10.

Impact Analysis

The vulnerability can allow attackers to make the server perform unauthorized requests to arbitrary URLs (SSRF), which can be used to access internal systems or sensitive information. Additionally, it may enable cross-site scripting (XSS), potentially compromising user data or session information. This can lead to data leakage, unauthorized access, or other security breaches.

Mitigation Strategies

Upgrade Astro to version 5.13.10 or later, as this version contains the fix for the image proxy domain validation bypass vulnerability.

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