CVE-2025-31124

Zitadel allows User Enumeration by loginname attribute normalization

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.

Category

5.3
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.06%
Affected: zitadel zitadel
Published at:
Updated at:

References

Frequently Asked Questions

What is the severity of CVE-2025-31124?
CVE-2025-31124 has been scored as a medium severity vulnerability.
How to fix CVE-2025-31124?
To fix CVE-2025-31124, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-31124 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-31124 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-31124?
CVE-2025-31124 affects zitadel zitadel.
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