wger: Trainer Privilege Escalation - Improper Privilege Management

{
  "id": "55a8428017a1e35146389292d70718706f7f0f9ef09066b3faf8b0142b424335",
  "url": "https://osv.dev/vulnerability/PYSEC-2026-4316",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "wger: Trainer Privilege Escalation - Improper Privilege Management",
    "summary": "### Summary A user with only the `gym_trainer` permission can deactivate any account in the same gym, including `gym_manager` and `general_gym_manager` accounts. The `UserDeactivateView` grants access to anyone holding **any one** of `gym.manage_gym`, `gym.manage_gyms`, or `gym.gym_trainer` (OR logic via `WgerMultiplePermissionRequiredMixin`), and performs no privilege-hierarchy check to prevent a lower-privileged role from disabling a higher-privileged one. ### Details `UserDeactivateView` (file: `wger/core/views/user.py`, line 378) is configured with: ```python permission_required = ('gym.manage_gym', 'gym.manage_gyms', 'gym.gym_trainer') ``` `WgerMultiplePermissionRequiredMixin` (file: `wger/utils/generic_views.py`, line 48) treats this tuple as an OR check -- any single permission is sufficient: ```python class WgerMultiplePermissionRequiredMixin(PermissionRequiredMixin): def has_permission(self): for permission in self.get_permission_required(): if self.request.user.has_perm(permission): return True # <-- ANY one permission is enough return False ``` The `dispatch()` method only verifies same-gym membership: ```python def dispatch(self, request, *args, **kwargs): edit_user = get_object_or_404(User, pk=self.kwargs['pk']) if ( request.user.has_perm('gym.manage_gym') or request.user.has_perm('gym.gym_trainer') ) and edit_user.userprofile.gym_id != request.user.userprofile.gym_id: return HttpResponseForbidden() # NO check: is the target user more privileged than the requeste",
    "evidence": "osv:PYSEC-2026-4316",
    "products": [
      {
        "name": {
          "value": "wger",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.1.1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.2rc1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.3",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.4",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.5",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.6",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.6.1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.7",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.8",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.9",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.0",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2.1",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "high",
    "structured": {
      "id": "PYSEC-2026-4316",
      "aliases": [
        "CVE-2026-46434",
        "GHSA-x249-cx55-2h87",
        "PYSEC-2026-4316"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "2.1"
                }
              ]
            }
          ],
          "package": {
            "name": "wger",
            "purl": "pkg:pypi/wger",
            "ecosystem": "PyPI"
          },
          "versions": [
            "1.1",
            "1.1.1",
            "1.2",
            "1.2rc1",
            "1.3",
            "1.4",
            "1.5",
            "1.6",
            "1.6.1",
            "1.7",
            "1.8",
            "1.9",
            "2.0",
            "2.1"
          ],
          "database_specific": {
            "source": "https://github.com/pypa/advisory-database/blob/main/vulns/wger/PYSEC-2026-4316.yaml"
          }
        }
      ],
      "modified": "2026-10-15T14:45:10.347690155Z",
      "provider": "osv",
      "references": [
        "https://github.com/wger-project/wger/security/advisories/GHSA-x249-cx55-2h87",
        "https://github.com/wger-project/wger",
        "https://github.com/wger-project/wger/releases/tag/2.6",
        "https://pypi.org/project/wger",
        "https://github.com/advisories/GHSA-x249-cx55-2h87",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-46434"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-46434",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 332650,
  "published_at": "2026-10-15T10:22:47.076447+00:00"
}