CVE-2023-23596

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 15.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-01-20 · updated 2026-06-17
Weakness: CWE-78

Description

jc21 NGINX Proxy Manager through 2.9.19 allows OS command injection. When creating an access list, the backend builds an htpasswd file with crafted username and/or password input that is concatenated without any validation, and is directly passed to the exec command, potentially allowing an authenticated attacker to execute arbitrary commands on the system. NOTE: this is not part of any NGINX software shipped by F5.

Affected products

Jc21 Nginx Proxy Manager: through 2.9.19

References

https://advisory.dw1.io/57
https://github.com/NginxProxyManager/nginx-proxy-manager/blob/4f10d129c20cc82494b95cc94b97f859dbd4b54d/backend/internal/access-list.js#L510
https://advisory.dw1.io/57
https://github.com/NginxProxyManager/nginx-proxy-manager/blob/4f10d129c20cc82494b95cc94b97f859dbd4b54d/backend/internal/access-list.js#L510

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