What’s Vulnerable › Vulnerabilities

CVE-2024-37312: Nextcloud user_oidc app's ID4me feature is available even when disabled

• Severity: medium (CVSS 6.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2024-06-14 · updated 2026-06-17
• Weakness: CWE-284

Description

user_oidc app is an OpenID Connect user backend for Nextcloud. Missing access control on the ID4me endpoint allows an attacker to register an account eventually getting access to data that is available to all registered users. It is recommended that the OpenID Connect user backend is upgraded to 3.0.0 (Nextcloud 20-23), 4.0.0 (Nexcloud 24) or 5.0.0 (Nextcloud 25-28).

Affected products

• nextcloud User Oidc: before 5.0.0 — fixed in 5.0.0

How to fix

Upgrade to a fixed version: nextcloud User Oidc 5.0.0. Check the vendor advisory for mitigations.

References

• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-vw7g-959g-vj6q
• https://github.com/nextcloud/user_oidc/commit/9f68a716ecd264160a7c098b8840313f1ac855f2
• https://hackerone.com/reports/2376929
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-vw7g-959g-vj6q
• https://github.com/nextcloud/user_oidc/commit/9f68a716ecd264160a7c098b8840313f1ac855f2
• https://hackerone.com/reports/2376929

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