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        "cveId": "CVE-2026-23899",
        "assignerOrgId": "6ff30186-7fb7-4ad9-be33-533e7b05e586",
        "state": "PUBLISHED",
        "assignerShortName": "Joomla",
        "dateReserved": "2026-01-17T04:38:44.009Z",
        "datePublished": "2026-04-01T09:03:18.563Z",
        "dateUpdated": "2026-04-01T19:31:28.487Z"
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    "containers": {
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                    "defaultStatus": "unaffected",
                    "product": "Joomla! CMS",
                    "vendor": "Joomla! Project",
                    "versions": [
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                            "status": "affected",
                            "version": "4.0.0-5.4.3"
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                            "status": "affected",
                            "version": "6.0.0-6.0.3"
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            "credits": [
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                    "lang": "en",
                    "type": "finder",
                    "value": "Thành Nguyễn"
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                            "value": "An improper access check allows unauthorized access to webservice endpoints."
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                {
                    "capecId": "CAPEC-1",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs"
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                    ]
                }
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                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "HIGH",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "HIGH",
                        "subConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "HIGH",
                        "subIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "HIGH",
                        "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": 8.6,
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
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                    "descriptions": [
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                            "cweId": "CWE-284",
                            "description": "CWE-284 Improper Access Control",
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                            "type": "CWE"
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                }
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            "providerMetadata": {
                "orgId": "6ff30186-7fb7-4ad9-be33-533e7b05e586",
                "shortName": "Joomla",
                "dateUpdated": "2026-04-01T19:31:28.487Z"
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                {
                    "tags": [
                        "vendor-advisory"
                    ],
                    "url": "https://developer.joomla.org/security-centre/1032-20260306-core-improper-access-check-in-webservice-endpoints.html"
                }
            ],
            "source": {
                "discovery": "UNKNOWN"
            },
            "title": "Joomla! Core - [20260306] - Improper access check in webservice endpoints",
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                                "timestamp": "2026-04-01T12:45:21.761554Z",
                                "id": "CVE-2026-23899",
                                "options": [
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                                        "Exploitation": "none"
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                "title": "CISA ADP Vulnrichment",
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