CVE-2025-64764

Unknown Unknown - Not Provided

BaseFortify

Publication date: 2025-11-19

Last updated on: 2025-11-20

Assigner: GitHub, Inc.

Description

Astro is a web framework. Prior to version 5.15.8, a reflected XSS vulnerability is present when the server islands feature is used in the targeted application, regardless of what was intended by the component template(s). This issue has been patched in version 5.15.8.

CVSS Scores

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Meta Information

Published

2025-11-19

Last Modified

2025-11-20

Generated

2026-07-06

AI Q&A

2025-11-19

EPSS Evaluated

2026-07-05

NVD

CVE-2025-64764

EUVD

EUVD-2025-198184

Affected Vendors & Products

Vendor	Product	Version / Range
astro	astro	to 5.15.8 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-80	The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages.

Attack-Flow Graph

Executive Summary

This vulnerability is a reflected Cross-Site Scripting (XSS) issue in the Astro web framework versions prior to 5.15.8. It occurs when the server islands feature is used in an application, allowing attackers to inject malicious scripts that are reflected back to users, regardless of the intended behavior of the component templates. This can lead to execution of unauthorized scripts in users' browsers.

Impact Analysis

The vulnerability can allow attackers to execute malicious scripts in the context of users' browsers, potentially leading to theft of sensitive information, session hijacking, or other malicious actions that compromise user security and trust.

Mitigation Strategies

Upgrade the Astro web framework to version 5.15.8 or later, as this version contains the patch that fixes the reflected XSS vulnerability related to the server islands feature.

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