Read the docs
TI-2023-20654 Aliases CVE-2023-39522

Username enumeration attack in goauthentik

Priority LOW 31CWE-203Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-203.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0062 49th percentileScored 2026-11-07
Fix Fixed authentik (goauthentik): 2023.6.2, 2023.5.6

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
goauthentikauthentik2023.6.0 to before 2023.6.2; before 2023.5.62023.6.2, 2023.5.6Patch availableCNA
  • authentik Vendorgoauthentik Affected 2023.6.0 to before 2023.6.2; before 2023.5.6 Fixed in 2023.6.2, 2023.5.6 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:*before 2023.5.6; 2023.6.0 to before 2023.6.2Vulnerablegoauthentik
  • cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:* Versions before 2023.5.6; 2023.6.0 to before 2023.6.2 Vulnerable ·goauthentik

Remediation

  • Fix · CNA authentik (goauthentik) Fixed in 2023.6.2, 2023.5.6

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-39522

References

Patch 1

Advisory 1

  • TI-2026-36603 authentik: SourceStage bypass via empty POST CVSS 3.1CRITICAL 9.8
  • TI-2022-07608 authentik vulnerable to Improper Authentication via invitation URL token reuse CVSS 3.1CRITICAL 9.4
  • TI-2026-36598 authentik: `UserSourceConnection.user` and `GroupSourceConnection.group` are changeable through the API CVSS 3.1HIGH 8.8
  • TI-2022-22816 authentik allows existing authenticated users to create arbitrary accounts CVSS 3.1MEDIUM 6.4
  • TI-2024-25628 Insufficient access control for OAuth2 Device Code flow in authentik CVSS 3.1CRITICAL 9.8
  • TI-2023-24876 authentik potential installation takeover when default admin user is deleted CVSS 3.1CRITICAL 9.8
See all 32 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences