CVE-2025-50579 — MEDIUM (5.3)

Vulnerability Description

A CORS misconfiguration in Nginx Proxy Manager v2.12.3 allows unauthorized domains to access sensitive data, particularly JWT tokens, due to improper validation of the Origin header. This misconfiguration enables attackers to intercept tokens using a simple browser script and exfiltrate them to a remote attacker-controlled server, potentially leading to unauthorized actions within the application.

CVSS Score

5.3

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Jc21	Nginx Proxy Manager	2.12.3

Related Weaknesses (CWE)

CWE-1259

References

https://github.com/NginxProxyManager/nginx-proxy-managerProduct
https://github.com/NginxProxyManager/nginx-proxy-manager/issues/4509Issue TrackingVendor Advisory

FAQ

What is CVE-2025-50579?

CVE-2025-50579 is a vulnerability with a CVSS score of 5.3 (MEDIUM). A CORS misconfiguration in Nginx Proxy Manager v2.12.3 allows unauthorized domains to access sensitive data, particularly JWT tokens, due to improper validation of the Origin header. This misconfigura...

How severe is CVE-2025-50579?

CVE-2025-50579 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-50579?

Check the references section above for vendor advisories and patch information. Affected products include: Jc21 Nginx Proxy Manager.