{"cve":"CVE-2023-44399","nvd":{"published":"2023-10-10T17:15:13.107","modified":"2026-06-17T06:27:34.170","status":"Modified","description":"ZITADEL provides identity infrastructure. In versions 2.37.2 and prior, ZITADEL administrators can enable a setting called \"Ignoring unknown usernames\" which helps mitigate attacks that try to guess/enumerate usernames. While this settings was properly working during the authentication process it did not work correctly on the password reset flow. This meant that even if this feature was active that an attacker could use the password reset function to verify if an account exist within ZITADEL. This bug has been patched in versions 2.37.3 and 2.38.0. No known workarounds are available.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":5.3},"cwes":["CWE-640"],"references":["https://github.com/zitadel/zitadel/releases/tag/v2.37.3","https://github.com/zitadel/zitadel/releases/tag/v2.38.0","https://github.com/zitadel/zitadel/security/advisories/GHSA-v683-rcxx-vpff","https://github.com/zitadel/zitadel/releases/tag/v2.37.3","https://github.com/zitadel/zitadel/releases/tag/v2.38.0"],"products":["zitadel:zitadel"],"source":"nvd","synced_at":"2026-10-19T21:39:34.467980132+00:00"},"epss":{"cve":"CVE-2023-44399","score":0.00665,"percentile":0.51822,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-v683-rcxx-vpff","url":"https://osv.dev/vulnerability/GHSA-v683-rcxx-vpff","summary":"ZITADEL's password reset does not respect the \"Ignoring unknown usernames\" setting","modified":"2026-09-10T03:50:08.710208430Z","packages":[{"ecosystem":"Go","name":"github.com/zitadel/zitadel","purl":"pkg:golang/github.com/zitadel/zitadel","ranges":["<2.37.3"],"fixed":["2.37.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}