Caddy Proxy Manager: Registrations enabled by default allows creating users with "user" permission

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-54907
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 21:17:17 UTC
Updated2026-09-23 18:12:04 UTC
DescriptionCaddy 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.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

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

EPSS: 0.001730000 probability, percentile 0.070710000 (date 2026-09-23)

Problem Types: CWE-1188 | CWE-1188 CWE-1188: Insecure Default Initialization of Resource

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
3.1CNADECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Fuomag9 Caddy-proxy-manager affected < 1.5.1 Not specified

References

ReferenceSourceLinkTags
github.com/fuomag9/caddy-proxy-manager/security/advisories/GHSA-4wcc-gwx... [email protected] github.com
github.com/fuomag9/caddy-proxy-manager/commit/ed6d04f0d80a9c4c234e83e11a... [email protected] github.com
github.com/fuomag9/caddy-proxy-manager/releases/tag/v1.5.1 [email protected] github.com
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