CVE-2025-65019 — Astro Cloudflare adapter has a Stored Cross Site Scripting vulnerability in /_image endpoint
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) c…
Published: 2025-11-19 · CVSS: 5.4 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7