CVE-2025-64764

⚠️ high

Summary

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 Score

7.1

High

EPSS Score

0.5

Exploit Probability

Published Date

2025-11-19

First Seen: 2026-01-05

📊 Relative Risk Intelligence

This CVE is Moderate Risk - more severe than 53.3% of all 329,456 vulnerabilities in our database.

#153,866

Above average severity

Severity Percentile

🎯 CISA SSVC Assessment Updated: Nov 19, 2025

🔍 Exploitation Status

Poc

Proof-of-concept available

⚙️ Automatable

Requires human interaction

💥 Technical Impact

Partial

Limited system impact

SSVC data provided by CISA

Last Modified 2025-11-20

Source NVD 🔗

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

CWE IDs (Weakness Types)

CWE-80

📦 Affected Products 1

Vendor	Product	Status	Affected Versions
astro	astro	Affected	< 5.15.8

💣 Public Exploits 1 PRO

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🔗 References 2

https://github.com/withastro/astro/commit/790d9425f3...

Patch

https://github.com/withastro/astro/security/advisori...

Exploit Vendor Advisory

🔗 Related CVEs 6

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-50146	⚠️ high	7.1	0.2	Astro is a web framework. Prior to 6.3.3, when a component uses a client:* directive, Astro inserts named slot content i...	2026-06-22
CVE-2026-54298	🔶 medium	4.2	0.2	Astro is a web framework. Prior to 6.4.6, the spreadAttributes function in Astro's server-side rendering pipeline iterat...	2026-06-22
CVE-2026-54299	⚠️ high	7.5	0.2	Astro is a web framework. Prior to 6.4.6, Astro SSR apps with prerendered error pages (/404 or /500 using export const p...	2026-06-22
CVE-2026-45028	🔶 medium	6.1	0.0	Astro is a web framework. Astro versions prior to 6.1.10 used AES-GCM encryption to protect the confidentiality and inte...	2026-05-13
CVE-2026-41067	🔶 medium	6.1	0.0	Astro is a web framework. Prior to 6.1.6, the defineScriptVars function in Astro's server-side rendering pipeline uses a...	2026-04-24
CVE-2026-33769	🔶 medium	5.3	0.0	Astro is a web framework. From version 2.10.10 to before version 5.18.1, this issue concerns Astro's remotePatterns path...	2026-03-24

These CVEs affect the same products