CVE-2025-65019 - CVE House

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Status published Medium CVE-2025-65019

Astro Cloudflare adapter has a Stored Cross Site Scripting vulnerability in /_image endpoint

5.4 CVSS

Vulnerability Description

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

More from withastro

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Astro Development Server is Vulnerable to Arbitrary Local File Read

Astro development server error page vulnerable to reflected Cross-site Scripting

Affected Vendor

withastro

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Affected Software

astro

Vulnerable Versions:

< 5.15.9

Timeline

Official Publish: November 19th, 2025

Last Modified: November 19th, 2025

Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1189 Drive-by Compromise

T1059.007 JavaScript

T1539 Steal Web Session Cookie

T1213 Data from Information Repositories

T1567 Exfiltration Over Web Service

T1491.001 Defacement