CVE-2022-39307: 
Grafana vulnerability analysis and mitigation

Grafana, an open-source platform for monitoring and observability, was found to contain a security vulnerability identified as CVE-2022-39307. The vulnerability was discovered in the password reset functionality, where when using the forget password feature on the login page, a POST request to /api/user/password/sent-reset-email URL would reveal whether a username or email exists through a JSON response containing a "user not found" message. This vulnerability affects Grafana versions 8.0.0 prior to 8.5.15 and 9.0.0 prior to 9.2.4 (GitHub Advisory).

The vulnerability exists in the password reset functionality of Grafana's authentication system. When a user attempts to reset a password, the system makes a POST request to the /api/user/password/sent-reset-email endpoint. The vulnerability lies in the response handling, where the system explicitly indicates whether a user exists or not through a JSON response. The vulnerability has been assigned a CVSS v3.1 base score of 5.3 (Medium) with a vector of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N (GitHub Advisory).

The vulnerability allows unauthenticated users to enumerate valid usernames and email addresses in the system. This information disclosure could be leveraged by attackers to identify valid user accounts, potentially facilitating further attacks such as brute force attempts or social engineering (NetApp Security).

The vulnerability has been patched in Grafana versions 9.2.4 and 8.5.15. Users are advised to upgrade their Grafana instances to these or later versions. The fix has also been applied to Grafana Cloud, and cloud providers licensed to offer Grafana Pro, including Amazon Managed Grafana and Azure Managed Grafana, have confirmed their offerings are secure (GitHub Advisory).