What is CVE-2025-61925?

CVE-2025-61925 is a medium-severity vulnerability in Withastro Astro, classified under Use of Externally-Controlled Input to Select Classes or Code (Unsafe Reflection). CVSS score: 6.5/10. Published 2025-10-10.

How severe is CVE-2025-61925?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Withastro Astro

CVE-2025-61925

Astro is a web framework. Prior to version 5.14.2, Astro reflects the value in `X-Forwarded-Host` in output when using `Astro.url` without any validation. It is common for web servers such as nginx to route requests via the `Host` header…

EPSS: 0.001 (18.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.

Affected products

Withastro Astro — versions < 5.14.2

Weakness classification (CWE)

CWE-470 — Use of Externally-Controlled Input to Select Classes or Code (Unsafe Reflection)

References

https://github.com/withastro/astro/security/advisories/GHSA-5ff5-9fcw-vg88 (x_refsource_CONFIRM)
https://github.com/Chisnet/minimal_dynamic_astro_server (x_refsource_MISC)

Frequently asked questions

What is CVE-2025-61925?: CVE-2025-61925 is a medium-severity vulnerability in Withastro Astro, classified under Use of Externally-Controlled Input to Select Classes or Code (Unsafe Reflection). CVSS score: 6.5/10. Published 2025-10-10.
How severe is CVE-2025-61925?: Medium severity. CVSS v3 base score is 6.5 out of 10.