ghsa-f4cf-9rvr-2rcx
Vulnerability from github
Published
2025-12-10 18:20
Modified
2025-12-18 01:01
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
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.

Show details on source website

To clipboard 

{
  "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": "2025-12-18T01:01:47Z",
  "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"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.