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Vulnerability record · CVE-2025-50579 · published 19 August 2025

CVE-2025-50579: Jc21 nginx proxy manager vulnerability

Jc21 · Nginx Proxy Manager

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.

5.3 CVSS 3.1 Medium EPSS 0.38% · top 70.4% CWE-1259 · CWE-1259
5.3CVSS 3.1 base score
0.38%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2024-46256Jc21 nginx proxy manager command injection vulnerabilityA Command injection vulnerability in requestLetsEncryptSsl in NginxProxyManager 2.11.3 allows an attacker to RCE via Add Let's Encrypt Certificate.EPSS 3.1%9.8CVE-2023-27224Jc21 nginx proxy manager command injection vulnerabilityAn issue found in NginxProxyManager v.2.9.19 allows an attacker to execute arbitrary code via a lua script to the configuration file.EPSS 1.2%8.8CVE-2024-39935Jc21 nginx proxy manager os command injection vulnerabilityjc21 NGINX Proxy Manager before 2.11.3 allows backend/internal/certificate.js OS command injection by an authenticated user (with certificate managem…EPSS 0.88%8.8CVE-2023-23596Jc21 nginx proxy manager os command injection vulnerabilityjc21 NGINX Proxy Manager through 2.9.19 allows OS command injection. When creating an access list, the backend builds an htpasswd file with crafted u…EPSS 15%6.3CVE-2024-46257Jc21 nginx proxy manager sql injection vulnerabilityA Command injection vulnerability in requestLetsEncryptSslWithDnsChallenge in NginxProxyManager 2.11.3 allows an attacker to achieve remote code exec…EPSS 1.3%5.5CVE-2019-15517Jc21 nginx proxy manager path traversal vulnerabilityjc21 Nginx Proxy Manager before 2.0.13 allows %2e%2e%2f directory traversal.EPSS 0.73%

Source: NIST National Vulnerability Database (record CVE-2025-50579), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.