GHSA-F4CF-9RVR-2RCX

Vulnerability from github – Published: 2025-12-10 18:20 – Updated: 2025-12-11 15:51
VLAI?
Summary
Zitadel Discloses the Total Number of Instance Users
Details

Summary

Zitadel's User Service discloses the total number of instance users to unauthorized users.

Impact

The ZITADEL User Service exposes the total number of users within an instance to any authenticated user, regardless of their specific permissions. While this does not leak individual user data or PII, disclosing the total user count via the totalResult field constitutes an information disclosure vulnerability that may be sensitive in certain contexts.

Affected Versions

Systems running one of the following version are affected:

  • 4.x: 4.0.0-rc.1 through 4.7.1
  • 3.x: 3.0.0-rc.1 through 3.4.4
  • 2.x: 2.44.0 through 2.71.19

Patches

The vulnerability has been addressed in the latest release. The patch resolves the issue and returns the totalResult value corresponding to the number of instance users for whom the querying user has read permission.

  • 4.x: Upgrade to >=4.7.2
  • 3.x: Update to >=3.4.5
  • 2.x: Update to >=3.4.5 (or checkout the workarounds section)

Workarounds

The recommended solution is to update Zitadel to a patched version.

If a version upgrade is not possible, you can enable the permissionCheckV2 feature on your instance.

Questions

If you have any questions or comments about this advisory, please email us at security@zitadel.com

Credits

This vulnerability was found by zentrust partners GmbH during a scheduled penetration test. Thank you to the analysts Martin Tschirsich, Joud Zakharia, Christopher Baumann. The full report will be made public after the complete review.

Severity ?
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 4.7.1"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/zitadel/zitadel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.0.0-rc.1"
            },
            {
              "fixed": "4.7.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 3.4.4"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/zitadel/zitadel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.44.0"
            },
            {
              "fixed": "3.4.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/zitadel/zitadel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.80.0-v2.20.0.20251210121356-826039c6208f"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-67717"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-497"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-12-10T18:20:01Z",
    "nvd_published_at": "2025-12-11T01:16:01Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\n\nZitadel\u0027s User Service discloses the total number of instance users to unauthorized users.\n\n### Impact\n\nThe ZITADEL User Service exposes the total number of users within an instance to any authenticated user, regardless of their specific permissions. While this does not leak individual user data or PII, disclosing the total user count via the `totalResult` field constitutes an information disclosure vulnerability that may be sensitive in certain contexts.\n\n### Affected Versions\n\nSystems running one of the following version are affected:\n\n- **4.x**: `4.0.0-rc.1` through `4.7.1`\n- **3.x**: `3.0.0-rc.1` through `3.4.4`\n- **2.x**: `2.44.0` through `2.71.19`\n\n### Patches\n\nThe vulnerability has been addressed in the latest release. The patch resolves the issue and returns the `totalResult` value corresponding to the number of instance users for whom the querying user has read permission.\n\n- 4.x: Upgrade to \u003e=[4.7.2](https://github.com/zitadel/zitadel/releases/tag/v4.7.2)\n- 3.x: Update to \u003e=[3.4.5](https://github.com/zitadel/zitadel/releases/tag/v3.4.5)\n- 2.x: Update to \u003e=[3.4.5](https://github.com/zitadel/zitadel/releases/tag/v3.4.5) (or checkout the workarounds section)\n\n### Workarounds\n\nThe recommended solution is to update Zitadel to a patched version.\n\nIf a version upgrade is not possible, you can enable the `permissionCheckV2` feature on your instance.\n\n### Questions\n\nIf you have any questions or comments about this advisory, please email us at [security@zitadel.com](mailto:security@zitadel.com)\n\n### Credits\n\nThis vulnerability was found by [zentrust partners GmbH](https://zentrust.partners) during a scheduled penetration test. Thank you to the analysts Martin Tschirsich, Joud Zakharia, Christopher Baumann.\nThe full report will be made public after the complete review.",
  "id": "GHSA-f4cf-9rvr-2rcx",
  "modified": "2025-12-11T15:51:21Z",
  "published": "2025-12-10T18:20:01Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/zitadel/zitadel/security/advisories/GHSA-f4cf-9rvr-2rcx"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-67717"
    },
    {
      "type": "WEB",
      "url": "https://github.com/zitadel/zitadel/commit/826039c6208fe71df57b3a94c982b5ac5b0af12c"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/zitadel/zitadel"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Zitadel Discloses the Total Number of Instance Users"
}


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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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