CVE-2025-31124
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.
Does this matter?
Lower severity and a low EPSS score (0.51%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- EPSS
- 0.51% probability · 42th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-200, CWE-203, CWE-204
- Affected
- zitadel/zitadel
- Source
- security-advisories@github.com
References
- https://github.com/zitadel/zitadel/commit/14de8ecac2afafee4975ed7ac26f3ca4a2b0f82cPatch
- https://github.com/zitadel/zitadel/releases/tag/v2.63.9Release Notes
- https://github.com/zitadel/zitadel/releases/tag/v2.64.6Release Notes
- https://github.com/zitadel/zitadel/releases/tag/v2.65.7Release Notes
- https://github.com/zitadel/zitadel/releases/tag/v2.66.16Release Notes
- https://github.com/zitadel/zitadel/releases/tag/v2.67.13Release Notes
- https://github.com/zitadel/zitadel/releases/tag/v2.68.9Release Notes
- https://github.com/zitadel/zitadel/releases/tag/v2.69.9Release Notes
- https://github.com/zitadel/zitadel/releases/tag/v2.70.8Release Notes
- https://github.com/zitadel/zitadel/releases/tag/v2.71.6Release Notes
- https://github.com/zitadel/zitadel/security/advisories/GHSA-67m4-8g4w-633qVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.