{"id":"CVE-2026-91107","title":"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.","summary":"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.","severity":"critical","cvss":9.3,"cvssVector":"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","cwe":["CWE-639"],"vendor":"OS4ED","product":"openSIS-Classic","affected":["openSIS-Classic 9.3"],"published":"2026-10-05","updated":"2026-10-05","sourceUpdated":"2026-10-05T22:16:58.657","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-91107","references":[{"url":"https://fluidattacks.com/advisories/hearts","label":"help@fluidattacks.com"},{"url":"https://github.com/OS4ED/openSIS-Classic","label":"help@fluidattacks.com"},{"url":"https://github.com/OS4ED/openSIS-Classic/commit/24bb530391a67c114cd4fe3dff65da7e070f5ed1","label":"help@fluidattacks.com"}],"tags":["nvd","cve.org"],"cvssSource":"cna","ingestedAt":"2026-10-05T21:34:25.120Z","slug":"CVE-2026-91107","body":"## Overview\n\nopenSIS 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":51,"depthScoreParts":{"impact":51.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}