Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2025-31124

Severity CVSS v4.0:
Pending analysis
Type:
CWE-200 Information Leak / Disclosure
Publication date:
31/03/2025
Last modified:
26/08/2025

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.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N CVSS v3.1 Severity and Metrics:

Base Score: 5.30 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): Low
Integrity (I): None
Availability (A): None

Base Score 3.x
5.30
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:zitadel:zitadel:*:*:*:*:*:*:*:* 2.63.9 (excluding)
cpe:2.3:a:zitadel:zitadel:*:*:*:*:*:*:*:* 2.64.0 (including) 2.64.6 (excluding)
cpe:2.3:a:zitadel:zitadel:*:*:*:*:*:*:*:* 2.65.0 (including) 2.65.7 (excluding)
cpe:2.3:a:zitadel:zitadel:*:*:*:*:*:*:*:* 2.66.0 (including) 2.66.16 (excluding)
cpe:2.3:a:zitadel:zitadel:*:*:*:*:*:*:*:* 2.67.0 (including) 2.67.13 (excluding)
cpe:2.3:a:zitadel:zitadel:*:*:*:*:*:*:*:* 2.68.0 (including) 2.68.9 (excluding)
cpe:2.3:a:zitadel:zitadel:*:*:*:*:*:*:*:* 2.69.0 (including) 2.69.9 (excluding)
cpe:2.3:a:zitadel:zitadel:*:*:*:*:*:*:*:* 2.70.0 (including) 2.70.8 (excluding)
cpe:2.3:a:zitadel:zitadel:*:*:*:*:*:*:*:* 2.71.0 (including) 2.71.6 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools