vuln-cve/data/2026/3xxx/CVE-2026-3240.json

{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-3240",
        "assignerOrgId": "ff5b8ace-8b95-4078-9743-eac1ca5451de",
        "state": "PUBLISHED",
        "assignerShortName": "ConcreteCMS",
        "dateReserved": "2026-02-26T01:42:11.496Z",
        "datePublished": "2026-03-04T02:15:53.400Z",
        "dateUpdated": "2026-03-04T15:33:21.842Z"
    },
    "containers": {
        "cna": {
            "affected": [
                {
                    "collectionURL": "https://github.com/concretecms/concretecms",
                    "defaultStatus": "unaffected",
                    "product": "Concrete CMS",
                    "repo": "https://github.com/concretecms/concretecms",
                    "vendor": "Concrete CMS",
                    "versions": [
                        {
                            "lessThan": "9.4.8",
                            "status": "affected",
                            "version": "5",
                            "versionType": "git"
                        }
                    ]
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "type": "finder",
                    "value": "minhnn42, namdi and quanlna2 from VCSLab-Viettel Cyber Security"
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "supportingMedia": [
                        {
                            "base64": false,
                            "type": "text/html",
                            "value": "<span style=\"background-color: rgb(255, 255, 255);\">In Concrete CMS below version 9.4.8, a&nbsp;</span><span style=\"background-color: rgb(255, 255, 255);\">user with permission to edit a page with element</span> Legacy form <span style=\"background-color: rgb(255, 255, 255);\">can perform a stored XSS attack towards high-privilege accounts via the&nbsp;</span>Question<span style=\"background-color: rgb(255, 255, 255);\"> field.&nbsp;The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 4.8 with vector&nbsp;CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N Thanks&nbsp;minhnn42, namdi and quanlna2 from VCSLab-Viettel Cyber Security for reporting.</span><br><br>"
                        }
                    ],
                    "value": "In Concrete CMS below version 9.4.8, a user with permission to edit a page with element Legacy form can perform a stored XSS attack towards high-privilege accounts via the Question field. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 4.8 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N Thanks minhnn42, namdi and quanlna2 from VCSLab-Viettel Cyber Security for reporting."
                }
            ],
            "impacts": [
                {
                    "capecId": "CAPEC-592",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-592 Stored XSS"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "Automatable": "NOT_DEFINED",
                        "Recovery": "NOT_DEFINED",
                        "Safety": "NOT_DEFINED",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "attackVector": "NETWORK",
                        "baseScore": 4.8,
                        "baseSeverity": "MEDIUM",
                        "exploitMaturity": "NOT_DEFINED",
                        "privilegesRequired": "HIGH",
                        "providerUrgency": "NOT_DEFINED",
                        "subAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "userInteraction": "PASSIVE",
                        "valueDensity": "NOT_DEFINED",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
                        "version": "4.0",
                        "vulnAvailabilityImpact": "NONE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "LOW",
                        "vulnerabilityResponseEffort": "NOT_DEFINED"
                    },
                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ]
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-79",
                            "description": "CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')",
                            "lang": "en",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "ff5b8ace-8b95-4078-9743-eac1ca5451de",
                "shortName": "ConcreteCMS",
                "dateUpdated": "2026-03-04T02:15:53.400Z"
            },
            "references": [
                {
                    "url": "https://github.com/concretecms/concretecms/pull/12826"
                },
                {
                    "url": "https://documentation.concretecms.org/9-x/developers/introduction/version-history/948-release-notes"
                }
            ],
            "source": {
                "advisory": "3451114",
                "defect": [
                    "HackerOne"
                ],
                "discovery": "EXTERNAL"
            },
            "title": "Concrete CMS below 9.4.8 is vulnerable to Stored XSS via Legacy form",
            "x_generator": {
                "engine": "Vulnogram 0.5.0"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-03-04T15:32:45.974969Z",
                                "id": "CVE-2026-3240",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-03-04T15:33:21.842Z"
                }
            }
        ]
    }
}