wger: cross-tenant password reset and plaintext disclosure via gym=None bypass

{
  "id": "e611f7a4719e6753643b6e20c6345734d77d7d3eea6e39ccb5dcf9e8bcf6ef46",
  "url": "https://osv.dev/vulnerability/CVE-2026-43948",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "wger: cross-tenant password reset and plaintext disclosure via gym=None bypass",
    "summary": "wger is a free, open-source workout and fitness manager. Prior to 2.6, the reset_user_password and gym_permissions_user_edit views in wger perform a gym-scope authorization check using Python object comparison (!=) that evaluates None != None as False, silently bypassing the guard when both the attacker and victim have no gym assignment (gym=None). A user with gym.manage_gym permission and gym=None can reset the password of any other gym=None user; the new plaintext password is returned verbatim in the HTML response body, enabling one-shot full account takeover. The victim's original password is invalidated, locking them out permanently. This vulnerability is fixed in 2.6.",
    "evidence": "osv:CVE-2026-43948",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-43948",
      "aliases": [
        "CVE-2026-43948",
        "GHSA-mhc8-p3jx-84mm",
        "PYSEC-2026-574"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/wger-project/wger",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "e1d70bcc38cd56ae4a254dca1713c404d069f319"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.6"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.6"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.5",
            "2.4",
            "2.3",
            "2.0",
            "1.9",
            "1.8",
            "1.7",
            "1.5",
            "1.4",
            "1.3",
            "1.2",
            "1.1",
            "1.0.3",
            "1.0.2",
            "1.0.1",
            "1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43948.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:30.106261101Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43948.json",
        "https://github.com/wger-project/wger/security/advisories/GHSA-mhc8-p3jx-84mm",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-43948"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-863"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43948.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-43948",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 497157,
  "published_at": "2026-05-12T20:47:23.906+00:00"
}