{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-66091",
        "assignerOrgId": "9c1820ae-fb77-4810-a8aa-ca46e7474d2f",
        "state": "PUBLISHED",
        "assignerShortName": "MON-CSIRT",
        "dateReserved": "2026-07-24T02:22:10.431Z",
        "datePublished": "2026-10-29T01:38:24.876Z",
        "dateUpdated": "2026-10-29T02:02:13.127Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "9c1820ae-fb77-4810-a8aa-ca46e7474d2f",
                "shortName": "MON-CSIRT",
                "dateUpdated": "2026-10-29T01:38:24.876Z"
            },
            "title": "Unauthenticated IDOR Enables Disclosure of Other Users’ last-known details",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "cweId": "CWE-639",
                            "description": "CWE-639 Authorization bypass through User-Controlled key",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "impacts": [
                {
                    "capecId": "CAPEC-126",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-126 Path Traversal"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "Apereo Foundation",
                    "product": "openEQUELLA",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "2019.2",
                            "lessThan": "2026.1",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In openEQUELLA before 2026.1, the GET /api/userquery/userinfobackup endpoint performs no authentication or authorisation check. An unauthenticated attacker who supplies another user's uniqueId can retrieve that user's stored personal details (username, first name, last name and email address) within the same institution.",
                    "supportingMedia": [
                        {
                            "type": "text/html",
                            "base64": false,
                            "value": "<p>In openEQUELLA before 2026.1, the GET /api/userquery/userinfobackup endpoint performs no authentication or authorisation check. An unauthenticated attacker who supplies another user's uniqueId can retrieve that user's stored personal details (username, first name, last name and email address) within the same institution.</p><br>"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://github.com/openequella/openEQUELLA/security/advisories/GHSA-mxj9-pmpw-j4xw",
                    "tags": [
                        "vendor-advisory"
                    ]
                },
                {
                    "url": "https://openequella.github.io/guides/",
                    "tags": [
                        "product"
                    ]
                }
            ],
            "metrics": [
                {
                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ],
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "LOW",
                        "subConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "exploitMaturity": "NOT_DEFINED",
                        "Safety": "NOT_DEFINED",
                        "Automatable": "NOT_DEFINED",
                        "Recovery": "NOT_DEFINED",
                        "valueDensity": "NOT_DEFINED",
                        "vulnerabilityResponseEffort": "NOT_DEFINED",
                        "providerUrgency": "NOT_DEFINED",
                        "version": "4.0",
                        "baseSeverity": "MEDIUM",
                        "baseScore": 6.9,
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"
                    }
                }
            ],
            "solutions": [
                {
                    "lang": "en",
                    "value": "Update to vendor recommended versions",
                    "supportingMedia": [
                        {
                            "type": "text/html",
                            "base64": false,
                            "value": "Update to vendor recommended versions"
                        }
                    ]
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "dr0v3r",
                    "type": "finder"
                }
            ],
            "source": {
                "discovery": "UNKNOWN"
            },
            "x_generator": {
                "engine": "Vulnogram 1.0.4"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "id": "CVE-2026-66091",
                                "role": "CISA Coordinator",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "version": "2.0.3",
                                "timestamp": "2026-10-29T01:50:21.266595Z"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-10-29T02:02:13.127Z"
                }
            }
        ]
    }
}