{"id":"CVE-2026-91107","summary":"openSIS Classic 9.3 - Insecure Direct Object Reference (IDOR)","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.","modified":"2026-10-08T02:30:36.634477240Z","published":"2026-10-05T21:29:29.268Z","database_specific":{"unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"9.3"},{"last_affected":"9.3"}]}],"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"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/os4ed/opensis-classic","events":[{"introduced":"0"},{"fixed":"24bb530391a67c114cd4fe3dff65da7e070f5ed1"}],"database_specific":{"source":"REFERENCES"}}],"versions":["V9.2","V9.1","V9.0","V8.0","V7.6","V7.5","ver7.4","v7.3","v7.2","ver7.1","v7.1","Ver7.0Prod_update","Ver7.0beta1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-91107.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","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"}]}