{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-91107", "assignerOrgId": "84fe0718-d6bb-4716-a7e8-81a6d1daa869", "state": "PUBLISHED", "assignerShortName": "Fluid Attacks", "dateReserved": "2026-09-14T19:25:23.243Z", "datePublished": "2026-10-05T21:29:29.268Z", "dateUpdated": "2026-10-05T21:29:29.268Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "platforms": ["Windows", "MacOS", "Linux"], "product": "openSIS-Classic", "vendor": "OS4ED", "versions": [{"status": "affected", "version": "9.3"}]}], "cpeApplicability": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:os4ed:opensis-classic:9.3:*:windows:*:*:*:*:*", "vulnerable": true}, {"criteria": "cpe:2.3:a:os4ed:opensis-classic:9.3:*:macos:*:*:*:*:*", "vulnerable": true}, {"criteria": "cpe:2.3:a:os4ed:opensis-classic:9.3:*:linux:*:*:*:*:*", "vulnerable": true}], "negate": false, "operator": "OR"}], "operator": "OR"}], "credits": [{"lang": "en", "type": "finder", "value": "Daniel Celis"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "openSIS Classic 9.3 allows a<span style=\"background-color: rgb(255, 255, 255);\">n authenticated user with the built-in </span><code>teacher</code><span style=\"background-color: rgb(255, 255, 255);\"> role can select an arbitrary staff record through </span><code>staff_id</code><span style=\"background-color: rgb(255, 255, 255);\"> and cause the School Information update path to reset that selected account's password.</span><br>"}], "value": "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."}], "impacts": [{"capecId": "CAPEC-122", "descriptions": [{"lang": "en", "value": "CAPEC-122 Privilege Abuse"}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "baseScore": 9.3, "baseSeverity": "CRITICAL", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "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", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-639", "description": "CWE-639 Authorization Bypass Through User-Controlled Key", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "84fe0718-d6bb-4716-a7e8-81a6d1daa869", "shortName": "Fluid Attacks", "dateUpdated": "2026-10-05T21:29:29.268Z"}, "references": [{"tags": ["third-party-advisory"], "url": "https://fluidattacks.com/advisories/hearts"}, {"tags": ["product"], "url": "https://github.com/OS4ED/openSIS-Classic"}, {"tags": ["patch"], "url": "https://github.com/OS4ED/openSIS-Classic/commit/24bb530391a67c114cd4fe3dff65da7e070f5ed1"}], "source": {"discovery": "UNKNOWN"}, "title": "openSIS Classic 9.3 - Insecure Direct Object Reference (IDOR)", "x_generator": {"engine": "Vulnogram 0.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "platforms": ["Windows", "MacOS", "Linux"], "product": "openSIS-Classic", "vendor": "OS4ED", "versions": [{"status": "affected", "version": "9.3"}]}], "source": "help@fluidattacks.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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", "lastModified": "2026-10-05T22:16:58.657", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 9.3, "baseSeverity": "CRITICAL", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "help@fluidattacks.com", "type": "Secondary"}]}, "published": "2026-10-05T22:16:58.657", "references": [{"source": "help@fluidattacks.com", "url": "https://fluidattacks.com/advisories/hearts"}, {"source": "help@fluidattacks.com", "url": "https://github.com/OS4ED/openSIS-Classic"}, {"source": "help@fluidattacks.com", "url": "https://github.com/OS4ED/openSIS-Classic/commit/24bb530391a67c114cd4fe3dff65da7e070f5ed1"}], "sourceIdentifier": "help@fluidattacks.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-639"}], "source": "help@fluidattacks.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": ["windows", "macos", "linux"], "status": "affected", "versions": {"scheme": "generic", "value": "9.3"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "openSIS-Classic", "source": "cna", "vendor": "OS4ED"}, "product": "opensis-classic", "vendor": "os4ed"}], "created": "2026-10-05T22:30:18.281975+00:00", "updated": "2026-10-05T22:30:19.108869+00:00", "vendors": ["os4ed", "os4ed$PRODUCT$opensis-classic"]}