CVE-2025-64525
November 13, 2025
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.
Affected Packages
https://github.com/withastro/astro.git (GITHUB):
Affected version(s) >=astro@3.0.0 <astro@5.15.5Fix Suggestion:
Update to version astro@5.15.5astro (NPM):
Affected version(s) >=3.0.0-beta.0 <5.15.5Fix Suggestion:
Update to version 5.15.5Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
LOW
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
LOW
Weakness Type (CWE)
Server-Side Request Forgery (SSRF)
EPSS
Base Score:
1.43
