CVE-2025-64764: astro — Exploit & Fix

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.

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CVSS v3.1 Score

7.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N

Weakness Type (CWE)

CWE-80 CWE-80

Affected Products

Vendor	Product	Versions
astro	astro	< 5.15.8

References

Advisories & Patches

https://github.com/withastro/astro/commit/790d9425f39bbbb462f1c27615781cd965009f91 https://github.com/withastro/astro/security/advisories/GHSA-wrwg-2hg8-v723

Exploits

https://github.com/withastro/astro/security/advisories/GHSA-wrwg-2hg8-v723

Frequently Asked Questions

What is CVE-2025-64764? +

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. It has a CVSS v3.1 base score of 7.1 (HIGH).

How severe is CVE-2025-64764? +

CVE-2025-64764 has a CVSS v3.1 score of 7.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-64764? +

CVE-2025-64764 affects products from astro, specifically: astro. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-64764? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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