CVE-2025-57770
The open-source identity infrastructure software Zitadel allows administrators to disable the user self-registration.
Does this matter?
Lower severity and a low EPSS score (0.38%). Track it; it rarely justifies an emergency change on its own.
Description
The open-source identity infrastructure software Zitadel allows administrators to disable the user self-registration. Versions 4.0.0 to 4.0.2, 3.0.0 to 3.3.6, and all versions prior to 2.71.15 are vulnerable to a username enumeration issue in the login interface. The login UI includes a security feature, Ignoring unknown usernames, that is intended to prevent username enumeration by returning a generic response for both valid and invalid usernames. This vulnerability allows an unauthenticated attacker to bypass this protection by submitting arbitrary userIDs to the select account page and distinguishing between valid and invalid accounts based on the system's response. For effective exploitation, an attacker needs to iterate through possible userIDs, but the impact can be limited by implementing rate limiting or similar measures. The issue has been patched in versions 4.0.3, 3.4.0, and 2.71.15.
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- EPSS
- 0.38% probability · 31th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-203
- Affected
- zitadel/zitadel
- Source
- security-advisories@github.com
References
- https://github.com/zitadel/zitadel/commit/7abe759c95cb360524d88b51744d03cbb6e4dcdbPatch
- https://github.com/zitadel/zitadel/releases/tag/v2.71.15Release Notes
- https://github.com/zitadel/zitadel/releases/tag/v3.4.0Release Notes
- https://github.com/zitadel/zitadel/releases/tag/v4.0.3Release Notes
- https://github.com/zitadel/zitadel/security/advisories/GHSA-g9c3-xh6v-fr86Vendor Advisory
- https://zitadel.com/docs/self-hosting/manage/production#limits-and-quotasProduct
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.