Home/CVE/Astro is a web framework. Prior to version 5.15.8, a reflected XSS vulnerability is present when the server islands feat
CVE

CVE-2025-64764

Astro is a web framework. Prior to version 5.15.8, a reflected XSS vulnerability is present when the server islands feat

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.

HIGH · CVSS 7.1 EPSS 0.00243
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
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Affected Products & Versions

1
astro< 5.15.8
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
npm astro HIGH fixed in 5.15.8
⚠

Public Exploits & PoCs

2
nucleiAstro - Reflected XSS via server islands featurehigh
pocgithub.com · GHSA-wrwg-2hg8-v723github.com
▣

Scoring & Timeline

7.1
HIGH · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD19 Nov 2025 · 05:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/withastro/astro/commit/790d9425f39bbbb462f1c27615781cd965009f91Patch
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