Medium 5.4Published Nov 19, 2025

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

Updated under an hour ago (Oct 26, 2026, 3:30 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for withastro astro

Exploited in the last 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.

CVSS: 5.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Nov 19, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

withastro astro withastro:astro (from the name)	before 5.15.9	CNA record
astro astro astro:astro	before 5.15.9	NVD

References

References

https://github.com/withastro/astro/security/advisories/GHSA-fvmw-cj7j-j39q	x-refsource-confirm, exploit, third-party-advisory
https://github.com/withastro/astro/commit/9e9c528191b6f5e06db9daf6ad26b8f68016e533	x-refsource-misc, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.