CVE-2024-37886 Nextcloud user_oidc's ID4me does not validate signature or expiration
Attackers can bypass authentication in Nextcloud's user_oidc app by submitting unsigned or expired ID4me tokens, potentially gaining unauthorized access.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2024-37886?
CVE-2024-37886 is a medium-severity authentication bypass vulnerability in nextcloud security-advisories, published on 14 Jun 2024. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
user_oidc app is an OpenID Connect user backend for Nextcloud. An attacker could potentially trick the app into accepting a request that is not signed by the correct server. It is recommended that the Nextcloud user_oidc app is upgraded to 1.3.5, 2.0.0, 3.0.0, 4.0.0 or 5.0.0.
Weakness: CWE-347
Which versions are affected by CVE-2024-37886?
It affects 1 product.
Products include Nextcloud User Oidc.
How do I fix CVE-2024-37886?
No fix has been published for CVE-2024-37886 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2024-37886 being exploited?
There is no known exploitation of CVE-2024-37886 in the wild and no public exploit code.
Other vulnerabilities in nextcloud security-advisories
- CVE-2023-32074 Nextcloud user_oidc app is missing brute force protection
- CVE-2024-37312 Nextcloud user_oidc app's ID4me feature is available even when disabled
- CVE-2023-39953 Issuer not verified from obtained token in user_oidc
- CVE-2023-28848 CSRF protection on user_oidc login returned the expected token in case of an error
- CVE-2026-45284 Nextcloud: Wrong condition in the User OIDC app's LdapService allowed deleted LDAP users to authenticate
Sources
Also known as GHSA-vw5h-29xf-g55g.