CVE-2025-64745
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-11-13

Last updated on: 2025-11-25

Assigner: GitHub, Inc.

Description
Astro is a web framework. Starting in version 5.2.0 and prior to version 5.15.6, a Reflected Cross-Site Scripting (XSS) vulnerability exists in Astro's development server error pages when the `trailingSlash` configuration option is used. An attacker can inject arbitrary JavaScript code that executes in the victim's browser context by crafting a malicious URL. While this vulnerability only affects the development server and not production builds, it could be exploited to compromise developer environments through social engineering or malicious links. Version 5.15.6 fixes the issue.
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Meta Information
Published
2025-11-13
Last Modified
2025-11-25
Generated
2026-06-16
AI Q&A
2025-11-13
EPSS Evaluated
2026-06-15
NVD
CVE-2025-64745
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
astro astro From 5.2.0 (inc) to 5.15.6 (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.
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Executive Summary

This vulnerability is a Reflected Cross-Site Scripting (XSS) issue in Astro's development server error pages when the 'trailingSlash' configuration option is used. It allows an attacker to inject and execute arbitrary JavaScript code in the victim's browser by crafting a malicious URL. This affects only the development server and not production builds.

Impact Analysis

The vulnerability could be exploited to compromise developer environments through social engineering or malicious links, potentially allowing attackers to execute arbitrary JavaScript in the developer's browser context. However, it does not affect production environments.

Mitigation Strategies

To mitigate this vulnerability, upgrade Astro to version 5.15.6 or later. Avoid using the vulnerable versions (5.2.0 up to but not including 5.15.6) in development environments, especially when the trailingSlash configuration option is enabled. Additionally, be cautious with links and inputs in developer environments to reduce risk from social engineering.

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