CVE-2025-65019: Astro

Medium severity, CVSS 6.1. EPSS: 0.3% chance of exploitation in the next 30 days.

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 products

• Astro Astro: before 5.15.9 (fixed in 5.15.9)

Published 2025-11-19. Last modified 2026-06-17.