CVE-2020-8236 Security feature bypass in Nextcloud Server
Nextcloud Server incorrectly treats WebAuthn PIN entry as verified two-factor authentication, allowing bypass of 2FA requirements.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-8236?
CVE-2020-8236 is a medium-severity vulnerability in Nextcloud Nextcloud Server, published on 30 Oct 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A wrong configuration in Nextcloud Server 19.0.1 incorrectly made the user feel the passwordless WebAuthn is also a two factor verification by asking for the PIN of the passwordless WebAuthn but not verifying it.
Weakness: CWE-287
Which versions are affected by CVE-2020-8236?
It affects 1 product.
Products include Nextcloud Nextcloud Server.
How do I fix CVE-2020-8236?
No fix has been published for CVE-2020-8236 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-8236 being exploited?
There is no known exploitation of CVE-2020-8236 in the wild and no public exploit code.
Other vulnerabilities in Nextcloud Nextcloud Server
- CVE-2021-32802 Preview generation used third-party library not suited for user-generated content in Nextcloud server
- CVE-2023-26482 Scope of workflow operations is not validated in nextcloud server
- CVE-2018-3775 Auth bypass in Nextcloud Server
- CVE-2023-35172 Nextcloud Server password reset endpoint is not brute force protected
- CVE-2023-32320 Nextcloud Server's brute force protection allows someone to send more requests than intended
Sources
Also known as GHSA-mwjc-vmmg-j6vm.