{
    "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": "2026-10-06T13:54:11.351Z"
    },
    "containers": {
        "cna": {
            "affected": [
                {
                    "defaultStatus": "unaffected",
                    "platforms": [
                        "Windows",
                        "MacOS",
                        "Linux"
                    ],
                    "product": "openSIS-Classic",
                    "vendor": "OS4ED",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "9.3"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
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                                    "criteria": "cpe:2.3:a:os4ed:opensis-classic:9.3:*:windows:*:*:*:*:*",
                                    "vulnerable": true
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                                {
                                    "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
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                            ],
                            "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"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-10-06T13:53:53.280988Z",
                                "id": "CVE-2026-91107",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-10-06T13:54:11.351Z"
                }
            }
        ]
    }
}