High 7.1Published Nov 19, 2025

CVE-2025-64764Astro is vulnerable to Reflected XSS via the server islands feature

Updated under an hour ago (Oct 27, 2026, 2:50 AM ET)

Does this affect you?

It affects withastro astro and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for withastro astro

Exploited in the last 30 days

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: 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N
Weakness (CWE): CWE-80
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Nov 19, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

withastro astro withastro:astro (from the name)	before 5.15.8	CNA record
astro astro astro:astro	before 5.15.8	NVD

References

References

https://github.com/withastro/astro/security/advisories/GHSA-wrwg-2hg8-v723	x-refsource-confirm, exploit, vendor-advisory
https://github.com/withastro/astro/commit/790d9425f39bbbb462f1c27615781cd965009f91	x-refsource-misc, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.