CORS Misconfiguration in Nginx Proxy Manager Affects Data Security
CVE-2025-50579

5.3MEDIUM

Key Information:

Vendor

Nginx

Status
Nginx Proxy Manager
Vendor
CVE Published:
19 August 2025

What is CVE-2025-50579?

A configuration flaw in Nginx Proxy Manager v2.12.3 permits unauthorized domains to access sensitive information, including JWT tokens. This occurs due to inadequate validation of the Origin header, allowing attackers to exploit the misconfiguration. Malicious actors can employ simple browser scripts to intercept these tokens and transmit them to a remote server under their control, potentially allowing unauthorized actions within the application.

References

https://github.com/NginxProxyManager/nginx-proxy-manager
https://github.com/NginxProxyManager/nginx-proxy-manager/...

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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CVE-2025-50579 : CORS Misconfiguration in Nginx Proxy Manager Affects Data Security