CVE-2023-39522

Username enumeration attack in goauthentik

Severity Score

5.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

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.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:Attend

Exploitation

None

Automatable

Yes

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2023-08-03 CVE Reserved
2023-08-29 CVE Published
2024-10-01 CVE Updated
2025-02-08 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-203: Observable Discrepancy

CAPEC

References (2)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://github.com/goauthentik/authentik/commit/aa874dd92a770d5f8cd8f265b7cdd31cd73a4599	2023-09-01

URL	Date	SRC
https://github.com/goauthentik/authentik/security/advisories/GHSA-vmf9-6pcv-xr87	2023-09-01

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Goauthentik Search vendor "Goauthentik"		Authentik Search vendor "Goauthentik" for product "Authentik"				< 2023.5.6 Search vendor "Goauthentik" for product "Authentik" and version " < 2023.5.6"		-		Affected
Goauthentik Search vendor "Goauthentik"		Authentik Search vendor "Goauthentik" for product "Authentik"				>= 2023.6.0 < 2023.6.2 Search vendor "Goauthentik" for product "Authentik" and version " >= 2023.6.0 < 2023.6.2"		-		Affected