CVE-2025-65019 MEDIUM

CVE-2025-65019: Astro Cloudflare adapter has a Stored Cross Site Scripting vulnerability in /_image endpoint

Vendor Withastro
Product astro
Weakness CWE-79 · XSS
Published November 19, 2025
Last update November 19, 2025
View on NVD All CVEs

CVSS base score

5.4/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

Astro is a web framework. Prior to version 5.15.9, when using Astro's Cloudflare adapter (@astrojs/cloudflare) with output: 'server', the image optimization endpoint (/_image) contains a critical vulnerability in the isRemoteAllowed() function that unconditionally allows data: protocol URLs. This enables Cross-Site Scripting (XSS) attacks through malicious SVG payloads, bypassing domain restrictions and Content Security Policy protections. This issue has been patched in version 5.15.9.

Key dates

02Disclosure timeline

November 19, 2025 CVE published
November 19, 2025 Record updated

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04Related CVE

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