Publish GHSA-xf68-8hjw-7mpm

Author: advisory-database[bot]

advisories/github-reviewed/2026/02/GHSA-xf68-8hjw-7mpm/GHSA-xf68-8hjw-7mpm.json

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+{
+  "schema_version": "1.4.0",
+  "id": "GHSA-xf68-8hjw-7mpm",
+  "modified": "2026-02-26T22:13:13Z",
+  "published": "2026-02-26T22:13:13Z",
+  "aliases": [
+    "CVE-2026-27835"
+  ],
+  "summary": "wger: IDOR in RepetitionsConfig and MaxRepetitionsConfig API leak other users' workout data",
+  "details": "### Summary\n\n`RepetitionsConfigViewSet` and `MaxRepetitionsConfigViewSet` return all users' repetition config data because their `get_queryset()` calls `.all()` instead of filtering by the authenticated user. Any registered user can enumerate every other user's workout structure.\n\n### Details\n\n`wger/manager/api/views.py:499` and `:518`:\n\n```python\n# VULNERABLE\nclass RepetitionsConfigViewSet(viewsets.ModelViewSet):\n    def get_queryset(self):\n        return RepetitionsConfig.objects.all()\n\nclass MaxRepetitionsConfigViewSet(viewsets.ModelViewSet):\n    def get_queryset(self):\n        return MaxRepetitionsConfig.objects.all()\n```\n\nEvery sibling viewset in the same file correctly filters by user. For example, `WeightConfigViewSet` at line 459:\n\n```python\n# CORRECT — how it should work\ndef get_queryset(self):\n    return WeightConfig.objects.filter(\n        slot_entry__slot__day__routine__user=self.request.user\n    )\n```\n\nThe same user filter is present on `SetsConfig`, `RestConfig`, `RiRConfig`, and their Max variants — only `RepetitionsConfig` and `MaxRepetitionsConfig` are missing it.\n\n### PoC\n\n```python\nimport requests\n\nBASE = \"http://localhost\"\nheaders = {\"Authorization\": \"Token YOUR_TOKEN\"}  # any registered user\n\nr = requests.get(f\"{BASE}/api/v2/repetitions-config/\", headers=headers)\nprint(r.json())  # returns ALL users' repetition configs, not just your own\n\nr = requests.get(f\"{BASE}/api/v2/max-repetitions-config/\", headers=headers)\nprint(r.json())  # same — all users' max repetition configs\n```\n\nRegistration is open by default. Sequential IDs allow full enumeration.\n\n### Impact\n\nAny authenticated user can read other users' repetition and max-repetitions configs, exposing workout structure (slot entry IDs, iteration values, operations, step counts, repeat flags, requirements JSON). This is a broken object-level authorization (BOLA/IDOR) vulnerability — the same class of issue as OWASP API1.\n\n**Fix**: Add the same user filter used by every other config viewset:\n```python\ndef get_queryset(self):\n    return RepetitionsConfig.objects.filter(\n        slot_entry__slot__day__routine__user=self.request.user\n    )\n```",
+  "severity": [
+    {
+      "type": "CVSS_V3",
+      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
+    }
+  ],
+  "affected": [
+    {
+      "package": {
+        "ecosystem": "PyPI",
+        "name": "wger"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "0"
+            },
+            {
+              "last_affected": "2.1"
+            }
+          ]
+        }
+      ]
+    }
+  ],
+  "references": [
+    {
+      "type": "WEB",
+      "url": "https://github.com/wger-project/wger/security/advisories/GHSA-xf68-8hjw-7mpm"
+    },
+    {
+      "type": "PACKAGE",
+      "url": "https://github.com/wger-project/wger"
+    }
+  ],
+  "database_specific": {
+    "cwe_ids": [
+      "CWE-639"
+    ],
+    "severity": "MODERATE",
+    "github_reviewed": true,
+    "github_reviewed_at": "2026-02-26T22:13:13Z",
+    "nvd_published_at": null
+  }
+}