Description
Nginx Proxy Manager through 2.16.0 lacks rate-limiting on authentication endpoints, allowing unauthenticated attackers to make unlimited password guesses against any account. Attackers can brute-force login credentials via POST /api/tokens and subsequently guess TOTP codes via POST /api/tokens/2fa to gain full session access and administrative control.
References6
- github.com/NginxProxyManager/nginx-proxy-manager
- github.com/NginxProxyManager/nginx-proxy-manager/blob/v2.16.0/b…
- github.com/NginxProxyManager/nginx-proxy-manager/blob/v2.16.0/b…
- github.com/NginxProxyManager/nginx-proxy-manager/blob/v2.16.0/b…
- github.com/NginxProxyManager/nginx-proxy-manager/pull/5908
- www.vulncheck.com/advisories/nginx-proxy-manager-through-2.16.0…
Metrics
- CVSS 3.1
-
7.4
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N - CVSS 4.0
-
9.1
CRITICAL
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 40 · as of 9 November 2026
- CWE
- CWE-307
Could this be exploited in your environment?
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