{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "source": "REFERENCES"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "24bb530391a67c114cd4fe3dff65da7e070f5ed1"
            }
          ],
          "repo": "https://github.com/os4ed/opensis-classic",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Fluid Attacks",
    "cwe_ids": [
      "CWE-639"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/91xxx/CVE-2026-91107.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "9.3"
          },
          {
            "last_affected": "9.3"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "openSIS Classic 9.3 allows an authenticated user with the built-in teacher role can select an arbitrary staff record through staff_id and cause the School Information update path to reset that selected account's password.",
  "id": "CVE-2026-91107",
  "modified": "2026-10-08T02:30:36.634477240Z",
  "published": "2026-10-05T21:29:29.268Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://fluidattacks.com/advisories/hearts"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/91xxx/CVE-2026-91107.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-91107"
    },
    {
      "type": "FIX",
      "url": "https://github.com/OS4ED/openSIS-Classic/commit/24bb530391a67c114cd4fe3dff65da7e070f5ed1"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/OS4ED/openSIS-Classic"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "openSIS Classic 9.3 - Insecure Direct Object Reference (IDOR)"
}