What is CVE-2025-65019?

CVE-2025-65019 is a medium-severity vulnerability in Withastro Astro, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-11-19.

How severe is CVE-2025-65019?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Withastro Astro

CVE-2025-65019

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() func…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (10.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.

Affected products

Withastro Astro — versions < 5.15.9

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

https://github.com/withastro/astro/security/advisories/GHSA-fvmw-cj7j-j39q (x_refsource_CONFIRM)
https://github.com/withastro/astro/commit/9e9c528191b6f5e06db9daf6ad26b8f68016e533 (x_refsource_MISC)

Frequently asked questions

What is CVE-2025-65019?: CVE-2025-65019 is a medium-severity vulnerability in Withastro Astro, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2025-11-19.
How severe is CVE-2025-65019?: Medium severity. CVSS v3 base score is 5.4 out of 10.