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.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2025-10-28

Last Modified

2025-11-25

Generated

2026-07-06

AI Q&A

2025-10-28

EPSS Evaluated

2026-07-05

NVD

CVE-2025-59837

Affected Vendors & Products

Vendor	Product	Version / Range
astro	astro	From 5.13.4 (inc) to 5.13.10 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
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.
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.

Attack-Flow Graph

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.

Hi! I’m here to help you understand CVE-2025-59837. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70