5.3

CVE-2023-39522: Username enumeration attack in goauthentik

Modified
AliasesGHSA-vmf9-6pcv-xr87BIT-authentik-2023-39522CGA-6xx3-5266-cqm4
Published 29-08-2023Last modified 01-10-2024

Vulnerability summary

CVE-2023-39522 is a medium (CVSS 5.3) Observable Discrepancy vulnerability in goauthentik authentik. EPSS estimates a 0.62% chance of exploitation in the next 30 days, higher than 49.7% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.3, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.62%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 0 · Related 1
CGA-J322-7FW6-C4CM

Timeline

  1. 29-08-2023
    PublishedVulnerability first disclosed.
  2. 01-10-2024
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.62%

Chance of exploitation in the next 30 days

Percentile

50%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.62% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard2 products
  • authentik-2026.5All versions (No fix recorded)
  • authentik-fips-2026.5All versions (No fix recorded)
@goauthentik1 product
  • api≥ 2023.6.0, < 2023.6.2 | < 2023.5.6
Goauthentik1 product
  • authentik< 2023.5.6 | ≥ 2023.6.0, < 2023.6.2

3 vendors · 4 products

References

6 links