CVE-2023-25820 Nextcloud Server and Enterprise Server missing brute force protection on password confirmation modal
Attackers with a logged-in session can brute force passwords on the confirmation modal due to missing rate limiting, potentially taking over accounts.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2023-25820?
CVE-2023-25820 is a medium-severity vulnerability in Nextcloud Nextcloud Server, published on 22 Mar 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Nextcloud Server is the file server software for Nextcloud, a self-hosted productivity platform, and Nextcloud Enterprise Server is the enterprise version of the file server software. In Nextcloud Server versions 25.0.x prior to 25.0.5 and versions 24.0.x prior to 24.0.10 as well as Nextcloud Enterprise Server versions 25.0.x prior to 25.0.4, 24.0.x prior to 24.0.10, 23.0.x prior to 23.0.12.5, 22.x prior to 22.2.0.10, and 21.x prior to 21.0.9.10, when an attacker gets access to an already logged in user session they can then brute force the password on the confirmation endpoint. Nextcloud Server should upgraded to 24.0.10 or 25.0.4 and Nextcloud Enterprise Server should upgraded to 21.0.9.10, 22.2.10.10, 23.0.12.5, 24.0.10, or 25.0.4 to receive a patch. No known workarounds are available.
Weakness: CWE-307
Which versions are affected by CVE-2023-25820?
It affects 1 product.
Products include Nextcloud Nextcloud Server.
How do I fix CVE-2023-25820?
No fix has been published for CVE-2023-25820 yet. Limit exposure of the affected software until one is available.
Is CVE-2023-25820 being exploited?
There is no known exploitation of CVE-2023-25820 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-36g6-wjx2-333x.