{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-30927",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-03-07T16:40:05.884Z",
        "datePublished": "2026-03-09T23:03:55.824Z",
        "dateUpdated": "2026-03-10T13:59:12.645Z"
    },
    "containers": {
        "cna": {
            "title": "Admidio: Event participation IDOR - non-leaders can register other users for events via user_uuid parameter",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-639",
                            "lang": "en",
                            "description": "CWE-639: Authorization Bypass Through User-Controlled Key",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "LOW",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "LOW",
                        "vulnAvailabilityImpact": "LOW",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 5.3,
                        "baseSeverity": "MEDIUM",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/Admidio/admidio/security/advisories/GHSA-7pfv-hr63-h7cw",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/Admidio/admidio/security/advisories/GHSA-7pfv-hr63-h7cw"
                },
                {
                    "name": "https://github.com/Admidio/admidio/issues/1985",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/Admidio/admidio/issues/1985"
                },
                {
                    "name": "https://github.com/Admidio/admidio/commit/e47f70cc3cbcdb39635fdbaaef02d19f604b8c3e",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/Admidio/admidio/commit/e47f70cc3cbcdb39635fdbaaef02d19f604b8c3e"
                }
            ],
            "affected": [
                {
                    "vendor": "Admidio",
                    "product": "admidio",
                    "versions": [
                        {
                            "version": "< 5.0.6",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-03-09T23:03:55.824Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Admidio is an open-source user management solution. Prior to 5.0.6, in modules/events/events_function.php, the event participation logic allows any user who can participate in an event to register OTHER users by manipulating the user_uuid GET parameter. The condition uses || (OR), meaning if possibleToParticipate() returns true (event is open for participation), ANY user - not just leaders - can specify a different user_uuid and register/cancel participation for that user. The code then operates on $user->getValue('usr_id') (the target user from user_uuid) rather than the current user. This vulnerability is fixed in 5.0.6."
                }
            ],
            "source": {
                "advisory": "GHSA-7pfv-hr63-h7cw",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-03-10T13:55:23.234262Z",
                                "id": "CVE-2026-30927",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-03-10T13:59:12.645Z"
                }
            }
        ]
    }
}