CVE-2019-15617 Auth bypass in Nextcloud Server
Attackers can bypass two-factor authentication by setting up a new second factor during login, potentially taking over accounts.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-15617?
CVE-2019-15617 is a medium-severity authentication bypass vulnerability in Nextcloud Nextcloud Server, published on 4 Feb 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A missing check in Nextcloud Server 17.0.0 allowed an attacker to set up a new second factor when trying to login.
Weakness: CWE-287
Which versions are affected by CVE-2019-15617?
It affects 1 product.
Products include Nextcloud Nextcloud Server.
How do I fix CVE-2019-15617?
No fix has been published for CVE-2019-15617 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-2019-15617 being exploited?
There is no known exploitation of CVE-2019-15617 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-mr7g-84h2-qmm4.