Zitadel allows User Enumeration by loginname attribute normalization
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| zitadel | zitadel | affected |
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Configuration 1 [-]
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No data.
| Vendor | Product | Versions |
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| Zitadel | Zitadel | — |
| Source | ID | Title |
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EUVD |
EUVD-2025-8871 | 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. |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.527% probability within 30 days)
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| CPEs | cpe:2.3:a:zitadel:zitadel:*:*:*:*:*:*:*:* |
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| Metrics |
ssvc
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| 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. | |
| Title | Zitadel allows User Enumeration by loginname attribute normalization | |
| Weaknesses | CWE-200 CWE-203 CWE-204 |
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| Metrics |
cvssV3_1
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