CVE-2023-49791 Workflows do not require password confirmation on API level
Attackers with active sessions can bypass password confirmation to modify or delete workflows via direct API calls.
- 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-2023-49791?
CVE-2023-49791 is a medium-severity missing authorization vulnerability in Nextcloud Nextcloud Server, published on 22 Dec 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. In Nextcloud Server prior to versions 26.0.9 and 27.1.4; as well as Nextcloud Enterprise Server prior to versions 23.0.12.13, 24.0.12.9, 25.0.13.4, 26.0.9, and 27.1.4; when an attacker manages to get access to an active session of another user via another way, they could delete and modify workflows by sending calls directly to the API bypassing the password confirmation shown in the UI. Nextcloud Server versions 26.0.9 and 27.1.4 and Nextcloud Enterprise Server versions 23.0.12.13, 24.0.12.9, 25.0.13.4, 26.0.9, and 27.1.4 contain a patch for this issue. No known workarounds are available.
Which versions are affected by CVE-2023-49791?
It affects 1 product.
Products include Nextcloud Nextcloud Server.
How do I fix CVE-2023-49791?
No fix has been published for CVE-2023-49791 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2023-49791 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-49791 exists.
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-3f8p-6qww-2prr.