CVE-2026-53902

{"id": "CVE-2026-53902", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-53902", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-01T13:42:48.531051Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.8}], "cvssMetricV40": [{"type": "Secondary", "source": "cvd@cert.pl", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 7.1, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "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/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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "cvd@cert.pl", "affectedData": [{"vendor": "MyComplianceOffice", "product": "MCO", "versions": [{"status": "affected", "version": "25.3.3.1", "versionType": "custom"}], "defaultStatus": "unknown"}]}], "published": "2026-07-01T13:17:45.237", "references": [{"url": "https://cert.pl/en/posts/2026/07/CVE-2026-53902", "tags": ["Third Party Advisory"], "source": "cvd@cert.pl"}, {"url": "https://mco.mycomplianceoffice.com/", "tags": ["Product"], "source": "cvd@cert.pl"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "cvd@cert.pl", "description": [{"lang": "en", "value": "CWE-266"}, {"lang": "en", "value": "CWE-863"}]}], "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.\u00a0/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\u00a0but may also affect other versions."}, {"lang": "es", "value": "MCO no aplica correctamente las comprobaciones de autorizaci\u00f3n en el endpoint /customer/servlet/mco/webapi/profile-sections/group-membership. Un usuario autenticado puede modificar su pertenencia a grupos sin las comprobaciones de autorizaci\u00f3n adecuadas, permitiendo la escalada de privilegios.\nUn atacante puede a\u00f1adirse a grupos arbitrarios proporcionando un ID de grupo v\u00e1lido, que puede obtenerse a trav\u00e9s de otras funcionalidades de la aplicaci\u00f3n (por ejemplo, /customer/servlet/mco/webapi/group/picker/groups), siempre que tenga los permisos necesarios, o potencialmente inferirse mediante t\u00e9cnicas de fuerza bruta.\n\nDebido a que los intentos de contacto con el proveedor no tuvieron \u00e9xito, la vulnerabilidad solo se ha confirmado en la versi\u00f3n 25.3.3.1, pero tambi\u00e9n puede afectar a otras versiones."}], "lastModified": "2026-10-25T17:10:00.197", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:mycomplianceoffice:mycomplianceoffice:25.3.3.1:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "48DA2BC8-3A28-4A74-9B08-67ECA8A34953"}], "operator": "OR"}]}], "sourceIdentifier": "cvd@cert.pl"}