CVE-2025-65019
November 19, 2025
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.
Affected Packages
https://github.com/withastro/astro.git (GITHUB):
Affected version(s) >=@astrojs/internal-helpers@0.1.1 <@astrojs/internal-helpers@0.7.5Fix Suggestion:
Update to version @astrojs/internal-helpers@0.7.5@astrojs/internal-helpers (NPM):
Affected version(s) >=0.1.0 <0.7.5Fix Suggestion:
Update to version 0.7.5astro (NPM):
Affected version(s) >=0.0.0-i18n-routing-20231101144500 <5.15.9Fix Suggestion:
Update to version 5.15.9Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.4
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
EPSS
Base Score:
0.1
