vuln-cve/data/2026/53xxx/CVE-2026-53902.json

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    "cveMetadata": {
        "cveId": "CVE-2026-53902",
        "assignerOrgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6",
        "state": "PUBLISHED",
        "assignerShortName": "CERT-PL",
        "dateReserved": "2026-06-11T07:44:52.179Z",
        "datePublished": "2026-07-01T11:58:31.205Z",
        "dateUpdated": "2026-07-01T13:42:53.914Z"
    },
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                "orgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6",
                "shortName": "CERT-PL",
                "dateUpdated": "2026-07-01T11:58:31.205Z"
            },
            "title": "Privilege Escalation in MCO",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "cweId": "CWE-266",
                            "description": "CWE-266 Incorrect Privilege Assignment",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "cweId": "CWE-863",
                            "description": "CWE-863 Incorrect Authorization",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "impacts": [
                {
                    "capecId": "CAPEC-233",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-233 Privilege Escalation"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "MyComplianceOffice",
                    "product": "MCO",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "25.3.3.1",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unknown"
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            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "MCO does not properly enforce authorization checks in the /customer/servlet/mco/webapi/profile-sections/group-membership endpoint. An authenticated user can modify their group membership without proper authorization checks, allowing privilege escalation.\nAn attacker can add themselves to arbitrary groups by supplying a valid group ID, which can be obtained via other application functionalities (e.g. /customer/servlet/mco/webapi/group/picker/groups), provided he has necessary permissions, or potentially inferred through brute-force techniques.\n\n\n\nBecause vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 25.3.3.1 but may also affect other versions.",
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                            "value": "MCO does not properly enforce authorization checks in the <i>/customer/servlet/mco/webapi/profile-sections/group-membership</i> endpoint. An authenticated user can modify their group membership without proper authorization checks, allowing privilege escalation.<br>An attacker can add themselves to arbitrary groups by supplying a valid group ID, which can be obtained via other application functionalities (e.g.&nbsp;<i>/customer/servlet/mco/webapi/group/picker/groups</i>), provided he has necessary permissions, or potentially inferred through brute-force techniques.<br><p><span><br>Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 25.3.3.1&nbsp;but may also affect other versions.</span></p>"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://cert.pl/en/posts/2026/07/CVE-2026-53902",
                    "tags": [
                        "third-party-advisory"
                    ]
                },
                {
                    "url": "https://mco.mycomplianceoffice.com/",
                    "tags": [
                        "product"
                    ]
                }
            ],
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                            "value": "GENERAL"
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                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "LOW",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "LOW",
                        "subConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "HIGH",
                        "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": "HIGH",
                        "baseScore": 7.1,
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N"
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            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Hubert Decyusz (AFINE Team)",
                    "type": "finder"
                }
            ],
            "source": {
                "discovery": "EXTERNAL"
            },
            "x_generator": {
                "engine": "Vulnogram 0.2.0"
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        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-07-01T13:42:48.531051Z",
                                "id": "CVE-2026-53902",
                                "options": [
                                    {
                                        "Exploitation": "none"
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                                        "Technical Impact": "partial"
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                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
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                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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                    "dateUpdated": "2026-07-01T13:42:53.914Z"
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