Information disclosure in Zitadel

CVE-2025-31124

Zitadel is open-source identity infrastructure software. ZITADEL administrators can enable a setting called "Ignoring unknown usernames" which helps mitigate attacks that try to guess/enumerate usernames. If enabled, ZITADEL will show the password prompt even if the user doesn't exist and report "Username or Password invalid". While the setting was correctly respected during the login flow, the user's username was normalized leading to a disclosure of the user's existence. This vulnerability is fixed in 2.71.6, 2.70.8, 2.69.9, 2.68.9, 2.67.13, 2.66.16, 2.65.7, 2.64.6, and 2.63.9.

Vulnerability class: Information Disclosure

Published · last modified .

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.005 (41.0th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-31124: held from 0.005 to 0.005.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

  • Zitadel — versions >= 2.62.0, < 2.63.9, >= 2.64.0-rc.1, < 2.64.6, >= 2.65.0-rc.1, < 2.65.7

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-31124?
CVE-2025-31124 is a medium-severity vulnerability in Zitadel, classified under Information Disclosure. CVSS score: 5.3/10. Published 2025-03-31.
How severe is CVE-2025-31124?
Medium severity. CVSS v3 base score is 5.3 out of 10.