CVE-2025-64764

Astro is vulnerable to Reflected XSS via the server islands feature

Published Nov 19, 2025 CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-wrwg-2hg8-v723 Astro vulnerable to reflected XSS via the server islands feature
History
Type Values Removed Values Added
First Time appeared Astro
Astro astro
CPEs cpe:2.3:a:astro:astro:*:*:*:*:*:node.js:*:*
Vendors & Products Astro
Astro astro
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Astro is vulnerable to Reflected XSS via the server islands feature
Weaknesses CWE-80
References
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Nov 19, 2025, 9:07 PM
Reserved
Nov 10, 2025, 10:29 PM
Status
Analyzed
Published
Nov 19, 2025, 5:15 PM
Modified
Oct 18, 2026, 8:10 PM