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        "assignerOrgId": "ff5b8ace-8b95-4078-9743-eac1ca5451de",
        "state": "PUBLISHED",
        "assignerShortName": "ConcreteCMS",
        "dateReserved": "2026-05-09T15:48:41.906Z",
        "datePublished": "2026-05-21T21:04:50.691Z",
        "dateUpdated": "2026-05-22T12:30:59.976Z"
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            "title": "Concrete CMS 9.5.0 and below is vulnerable to IDOR in '/ccm/frontend/conversations/message_page' allowing unauthenticated read of any conversation message",
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                            "cweId": "CWE-862",
                            "description": "CWE-862",
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                    "capecId": "CAPEC-122",
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                            "lang": "en",
                            "value": "CAPEC-122 Privilege Abuse"
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                    "vendor": "Concrete CMS",
                    "product": "Concrete CMS",
                    "collectionURL": "https://github.com/concretecms/concretecms",
                    "repo": "https://github.com/concretecms/concretecms",
                    "versions": [
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                            "version": "5.0",
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                    "lang": "en",
                    "value": "Concrete CMS 9.5.0 and below is vulnerable to IDOR. The '/ccm/frontend/conversations/message_page' endpoint returns the full content of any conversation message. An unauthenticated attacker can enumerate all conversation messages, including messages from restricted pages, member-only areas, and the moderation queue. File attachments with download URLs are also exposed. 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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                        "attackComplexity": "LOW",
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                        "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",
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