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    "cveMetadata": {
        "cveId": "CVE-2026-8239",
        "assignerOrgId": "ff5b8ace-8b95-4078-9743-eac1ca5451de",
        "state": "PUBLISHED",
        "assignerShortName": "ConcreteCMS",
        "dateReserved": "2026-05-09T16:01:16.574Z",
        "datePublished": "2026-05-21T21:00:52.541Z",
        "dateUpdated": "2026-05-22T12:29:59.743Z"
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                "shortName": "ConcreteCMS",
                "dateUpdated": "2026-05-21T21:00:52.541Z"
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            "title": "Concrete CMS 9.5.0 and below is vulnerable to IDOR in '/ccm/frontend/conversations/get_rating'",
            "problemTypes": [
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                        {
                            "lang": "en",
                            "cweId": "CWE-862",
                            "description": "CWE-862",
                            "type": "CWE"
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            ],
            "impacts": [
                {
                    "capecId": "CAPEC-122",
                    "descriptions": [
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                            "lang": "en",
                            "value": "CAPEC-122 Privilege Abuse"
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            "affected": [
                {
                    "vendor": "Concrete CMS",
                    "product": "Concrete CMS",
                    "collectionURL": "https://github.com/concretecms/concretecms",
                    "repo": "https://github.com/concretecms/concretecms",
                    "versions": [
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                            "status": "affected",
                            "version": "5.0",
                            "lessThanOrEqual": "9.5.0",
                            "versionType": "git"
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                    "value": "Concrete CMS 9.5.0 and below is vulnerable to IDOR. The '/ccm/frontend/conversations/get_rating' endpoint confirms existence and returns rating score for any message by ID. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 6.3 with Vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N. Thanks Tristan Madani for reporting.",
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                }
            ],
            "references": [
                {
                    "url": "https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes",
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                        "release-notes"
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                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "PRESENT",
                        "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",
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                        "baseScore": 6.3,
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            "credits": [
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                    "lang": "en",
                    "value": "Tristan Madani",
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            "source": {
                "defect": [
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                "advisory": "https://hackerone.com/reports/3611476",
                "discovery": "EXTERNAL"
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            {
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                                "timestamp": "2026-05-22T12:29:48.679413Z",
                                "id": "CVE-2026-8239",
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                                        "Exploitation": "none"
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