fuomag9 Caddy Proxy Manager up to 1.5.0 Self-Registration src/lib/config.ts improper authorization

Summaryinfo

A vulnerability was found in fuomag9 Caddy Proxy Manager up to 1.5.0. It has been classified as problematic. Affected by this vulnerability is an unknown functionality of the file src/lib/config.ts of the component Self-Registration. Performing a manipulation results in improper authorization. This vulnerability is known as CVE-2026-54907. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as problematic, was found in fuomag9 Caddy Proxy Manager up to 1.5.0. This affects an unknown code block of the file src/lib/config.ts of the component Self-Registration. The manipulation with an unknown input leads to a improper authorization vulnerability. CWE is classifying the issue as CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on integrity. The summary by CVE is:

Caddy Proxy Manager is a web interface for managing Caddy Server reverse proxies and certificates. Prior to 1.5.1, Caddy Proxy Manager enables email and password self-registration by default at /api/auth/sign-up/email, allowing an unauthenticated remote actor to create an active account with the user role without administrator approval. The user role cannot view or modify proxy data, so the direct impact is limited to unauthorized creation of low-privilege accounts. The fixed configuration in src/lib/config.ts and src/lib/auth-server.ts requires AUTH_ALLOW_SELF_REGISTRATION=true before the authentication library's disableSignUp control permits sign-up. This issue is fixed in version 1.5.1.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-54907 since 06/16/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1548.002 according to MITRE ATT&CK.

Upgrading to version 1.5.1 eliminates this vulnerability.

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Productinfo

Type

• Firewall Software

Vendor

• fuomag9

Name

• Caddy Proxy Manager

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5.0

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CPE 2.2info

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