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Vulnerability · Published Mar 31, 2025 · Assigned by GitHub_M

CVE-2025-31124Zitadel allows User Enumeration by loginname attribute normalization

Medium 5.3

In plain English

A medium-severity information exposure in zitadel from zitadel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.5%top 55.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

VendorProductVersions
zitadel zitadel >= 2.62.0, < 2.63.9>= 2.64.0-rc.1, < 2.64.6>= 2.65.0-rc.1, < 2.65.7>= 2.66.0-rc.1, < 2.66.16>= 2.67.0-rc.1, < 2.67.13>= 2.68.0-rc.1, < 2.68.9>= 2.69.0-rc.1, < 2.69.9>= 2.70.0-rc.1, < 2.70.8

Weakness: CWE-203, CWE-204, CWE-200 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References