{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-3452", "assignerOrgId": "ff5b8ace-8b95-4078-9743-eac1ca5451de", "state": "PUBLISHED", "assignerShortName": "ConcreteCMS", "dateReserved": "2026-03-02T17:51:28.741Z", "datePublished": "2026-03-04T01:49:27.027Z", "dateUpdated": "2026-03-04T16:02:10.496Z"}, "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": "reporter", "value": "YJK (@YJK0805) of ZUSO ART"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<div><div><br></div><div><div><div><div><div></div></div></div></div></div></div><div><div><div><div>Concrete CMS below version 9.4.8 is vulnerable to&nbsp;<span style=\"background-color: rgb(255, 255, 255);\">Remote Code Execution by&nbsp;</span><span style=\"background-color: rgb(255, 255, 255);\">stored PHP object injection into the Express Entry List block</span>&nbsp;via the columns parameter.&nbsp;<span style=\"background-color: rgb(255, 255, 255);\">An authenticated administrator can store attacker-controlled serialized data in block configuration fields that are later passed to </span><code>unserialize()</code><span style=\"background-color: rgb(255, 255, 255);\"> without class restrictions or integrity checks.&nbsp;The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 8.9 with vector&nbsp;CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H. Thanks&nbsp;<span style=\"background-color: rgb(255, 255, 255);\">YJK (</span><a target=\"_blank\" rel=\"nofollow\" href=\"https://hackerone.com/yjk0805\">@YJK0805</a><span style=\"background-color: rgb(255, 255, 255);\">) of </span><a target=\"_blank\" rel=\"nofollow\" href=\"https://zuso.ai/\">ZUSO ART</a>&nbsp;for reporting.&nbsp;</span></div></div></div></div><br>"}], "value": "Concrete CMS below version 9.4.8 is vulnerable to\u00a0Remote Code Execution by\u00a0stored PHP object injection into the Express Entry List block\u00a0via the columns parameter.\u00a0An authenticated administrator can store attacker-controlled serialized data in block configuration fields that are later passed to unserialize() without class restrictions or integrity checks.\u00a0The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 8.9 with vector\u00a0CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H. Thanks\u00a0YJK ( @YJK0805 https://hackerone.com/yjk0805 ) of ZUSO ART https://zuso.ai/ \u00a0for reporting."}], "impacts": [{"capecId": "CAPEC-253", "descriptions": [{"lang": "en", "value": "CAPEC-253 Remote Code Inclusion"}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "baseScore": 8.9, "baseSeverity": "HIGH", "exploitMaturity": "NOT_DEFINED", "privilegesRequired": "HIGH", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-502", "description": "CWE-502 Deserialization of Untrusted Data", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "ff5b8ace-8b95-4078-9743-eac1ca5451de", "shortName": "ConcreteCMS", "dateUpdated": "2026-03-04T01:49:27.027Z"}, "references": [{"url": "https://github.com/concretecms/concretecms/pull/12826/changes/167f16e4805d8ab546d2997c753ac21bf4854920://"}, {"url": "https://documentation.concretecms.org/9-x/developers/introduction/version-history/948-release-notes"}], "source": {"advisory": "3549050", "defect": ["HackerOne"], "discovery": "UNKNOWN"}, "title": "Concrete CMS below 9.4.8 is vulnerable to stored deserialization leading to RCE in the Express Entry List block.", "x_generator": {"engine": "Vulnogram 0.5.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-03-04T16:02:03.237046Z", "id": "CVE-2026-3452", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-04T16:02:10.496Z"}}]}}

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