CVE-2025-64525

Astro is a web framework. In Astro versions 2.16.0 up to but excluding 5.15.5 which utilizeon-demand rendering, request headers `x-forwarded-proto` and `x-forwarded-port` are insecurely used, without sanitization, to build the URL. This has several consequences, the most important of which are: middleware-based protected route bypass (only via `x-forwarded-proto`), DoS via cache poisoning (if a CDN is present), SSRF (only via `x-forwarded-proto`), URL pollution (potential SXSS, if a CDN is present), and WAF bypass. Version 5.15.5 contains a patch.

CVSS v3.1

6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

CVSS v3.1

6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

EPSS

1.16% chance of exploitation in the next 30 days, 65th percentile

Nuclei

medium

Published

2025-11-13

Proof-of-concept exploits (1)

• advisories/GHSA-hr2q-hp5q-x767

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-64525.yaml

References

• CVE Record
• NVD entry

Related

• CVE-2025-64523
• CVE-2025-6453
• CVE-2025-64522
• CVE-2025-6454
• CVE-2025-6452
• CVE-2025-6455