What is CVE-2025-50579?

CVE-2025-50579 is a medium-severity vulnerability in Jc21 nginx Proxy Manager, classified under CWE-1259. CVSS score: 5.3/10. Published 2025-08-19.

How severe is CVE-2025-50579?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Is CVE-2025-50579 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Jc21 nginx Proxy Manager

CVE-2025-50579

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.

EPSS: 0.004 (31.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Jc21 Nginx_proxy_manager — versions 2.12.3
N/a — versions n/a

Weakness classification (CWE)

CWE-1259

Public proof-of-concept exploits

References

cve@mitre.org (Product)
cve@mitre.org (Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2025-50579?: CVE-2025-50579 is a medium-severity vulnerability in Jc21 nginx Proxy Manager, classified under CWE-1259. CVSS score: 5.3/10. Published 2025-08-19.
How severe is CVE-2025-50579?: Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2025-50579 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.