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CVE-2025-64764

Astro is vulnerable to Reflected XSS via the server islands feature

Published: Nov 19, 2025Updated: Nov 20, 2025 Sources: CVE List NVD GHSACWE-80
NVD MITRE
7.1CVSSHIGH
EPSS Score
0.4%
Top 64.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Am I actually vulnerable?1 Nuclei template available — see how to check your systems. How to verify

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 Vector Breakdown

AV:NAC:LPR:NUI:RS:UC:LI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-80

Affected Products

astroastro
Mixed
OSS Libraries / web-framework
astronpmOSS Libraries
astrowithastro
Library
OSS Libraries / web-framework
astrooss-projectUSOSS Librariesaka @astrojs/node, @astrojs/cloudflare
npmpackage-ecosystemOSS Libraries
withastrooss-projectOSS Librariesaka astro, @astrojs/cloudflare

Exploitability

Official Patch Available

References

https://github.com/withastro/astro/commit/790d9425f39bbbb462f1c27615781cd965009f91
github.com
https://github.com/withastro/astro/security/advisories/GHSA-wrwg-2hg8-v723
github.com
https://nvd.nist.gov/vuln/detail/CVE-2025-64764
nvd.nist.gov
and 1 more references View all →

Timeline

Published
Nov 19, 2025
Last Updated
Nov 20, 2025

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