CVE-2025-31124: zitadel Information Disclosure — Fix

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.

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CVSS v3.1 Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Weakness Type (CWE)

CWE-200 CWE-200

CWE-203 CWE-203

CWE-204 CWE-204

Affected Products

Vendor	Product	Versions
zitadel	zitadel	< 2.63.9
zitadel	zitadel	2.64.0 — 2.64.6
zitadel	zitadel	2.65.0 — 2.65.7
zitadel	zitadel	2.66.0 — 2.66.16
zitadel	zitadel	2.67.0 — 2.67.13
zitadel	zitadel	2.68.0 — 2.68.9
zitadel	zitadel	2.69.0 — 2.69.9
zitadel	zitadel	2.70.0 — 2.70.8
zitadel	zitadel	2.71.0 — 2.71.6

References

Advisories & Patches

https://github.com/zitadel/zitadel/commit/14de8ecac2afafee4975ed7ac26f3ca4a2b0f82c https://github.com/zitadel/zitadel/security/advisories/GHSA-67m4-8g4w-633q

Other References

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2025-31124? +

CVE-2025-31124 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-31124? +

CVE-2025-31124 affects products from zitadel, specifically: zitadel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-31124? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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