CVE-2023-39522
MediumCVSS 5.3Exploitation Probability (EPSS)
Low risk40th percentile - higher than 40% of all known CVEs
Summary
In goauthentik, an open-source Identity Provider, affected versions with an enabled recovery flow allow an attacker to determine if a username exists. This issue only affects setups configured with a recovery flow.
Risk Assessment
Organizations may be exposed to the disclosure of existing usernames or email addresses, potentially leading to further attacks such as phishing or brute force.
Recommendation
It is recommended to upgrade to versions 2023.5.6 or 2023.6.2 to mitigate this vulnerability. There are no known workarounds for this issue.
Original NVD description (English source)
goauthentik is an open-source Identity Provider. In affected versions using a recovery flow with an identification stage an attacker is able to determine if a username exists. Only setups configured with a recovery flow are impacted by this. Anyone with a user account on a system with the recovery flow described above is susceptible to having their username/email revealed as existing. An attacker can easily enumerate and check users' existence using the recovery flow, as a clear message is shown when a user doesn't exist. Depending on configuration this can either be done by username, email, or both. This issue has been addressed in versions 2023.5.6 and 2023.6.2. Users are advised to upgrade. There are no known workarounds for this issue.