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Zitadel allows brute-forcing authentication factors

Type: advisorySources: OSV

Zitadel is open-source identity infrastructure software. Prior to 4.6.0, 3.4.3, and 2.71.18, an attacker can perform an online brute-force attack on OTP, TOTP, and passwords. While Zitadel allows preventing online brute force attacks in scenarios like TOTP, Email OTP, or passwords using a lockout mechanism. The mechanism is not enabled by default and can cause a denial of service for the corresponding user if enabled. Additionally, the mitigation strategies were not fully implemented in the more recent resource-based APIs. This vulnerability is fixed in 4.6.0, 3.4.3, and 2.71.18.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2025-64102
Confirmed fixed CVEs
Not specified
Updated in this feed
3 Nov 2026, 07:35 UTC · Revision 1

Source evidence

Zitadel allows brute-forcing authentication factors

core-osv · Original source

Published 29 Oct 2025, 18:36 UTC

Zitadel is open-source identity infrastructure software. Prior to 4.6.0, 3.4.3, and 2.71.18, an attacker can perform an online brute-force attack on OTP, TOTP, and passwords. While Zitadel allows preventing online brute force attacks in scenarios like TOTP, Email OTP, or passwords using a lockout mechanism. The mechanism is not enabled by default and can cause a denial of service for the corresponding user if enabled. Additionally, the mitigation strategies were not fully implemented in the more recent resource-based APIs. This vulnerability is fixed in 4.6.0, 3.4.3, and 2.71.18.

osv:CVE-2025-64102
Complete source record
{
  "id": "6b79352412c99baefc9887a4363e55c08b9aee53ace115f8a5b18a208a17d53c",
  "url": "https://osv.dev/vulnerability/CVE-2025-64102",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Zitadel allows brute-forcing authentication factors",
    "summary": "Zitadel is open-source identity infrastructure software. Prior to 4.6.0, 3.4.3, and 2.71.18, an attacker can perform an online brute-force attack on OTP, TOTP, and passwords. While Zitadel allows preventing online brute force attacks in scenarios like TOTP, Email OTP, or passwords using a lockout mechanism. The mechanism is not enabled by default and can cause a denial of service for the corresponding user if enabled. Additionally, the mitigation strategies were not fully implemented in the more recent resource-based APIs. This vulnerability is fixed in 4.6.0, 3.4.3, and 2.71.18.",
    "evidence": "osv:CVE-2025-64102",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-64102",
      "aliases": [
        "CVE-2025-64102",
        "GHSA-xrw9-r35x-x878",
        "GO-2025-4085"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/zitadel/zitadel",
              "type": "GIT",
              "events": [
                {
                  "introduced": "8f0b7ebf028187e84881694bb931cbe33604e308"
                },
                {
                  "fixed": "f7309f82953713922421add61d85994d876e8999"
                },
                {
                  "introduced": "0f0a55ca18873b85feaca561e6f0b3f081ad4204"
                },
                {
                  "fixed": "921ad56a2163f86b8ff32b9ddaaab64bea3d4fd4"
                },
                {
                  "introduced": "5b284f8c9ba65a88fb4d58ac6aa34be429b19e8e"
                },
                {
                  "fixed": "396cdd436cd5e1b217b1f0af4e1a3bd03d1dea5f"
                },
                {
                  "fixed": "b8db8cdf9cc8ea13f461758aef12457f8b7d972a"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "4.0.0-rc.1"
                      },
                      {
                        "fixed": "4.6.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "introduced": "3.0.0-rc.1"
                      },
                      {
                        "fixed": "3.4.3"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "introduced": "2.0.0"
                      },
                      {
                        "fixed": "2.71.18"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "b8db8cdf9cc8ea13f461758aef12457f8b7d972a"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
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          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-64102.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:26.571963941Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/64xxx/CVE-2025-64102.json",
        "https://github.com/zitadel/zitadel/security/advisories/GHSA-xrw9-r35x-x878",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-64102",
        "https://github.com/zitadel/zitadel/commit/b8db8cdf9cc8ea13f461758aef12457f8b7d972a"
      ],
      "provider_metadata": {
        "cwe_ids": [
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        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/64xxx/CVE-2025-64102.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-64102",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 493425,
  "published_at": "2025-10-29T18:36:15.39+00:00"
}