{"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 Remote Code Execution by stored PHP object injection into the Express Entry List block via the columns parameter. An authenticated administrator can store attacker-controlled serialized data in block configuration fields that are later passed to unserialize() without class restrictions or integrity checks. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 8.9 with vector 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 YJK ( @YJK0805 https://hackerone.com/yjk0805 ) of  ZUSO ART https://zuso.ai/  for 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"}}]}}