CVE-2026-3452

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.

CVSS v3 7.2 HIGH

7.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://documentation.concretecms.org/9-x/developers/introduction/version-history/948-release-notes	Patch Release Notes Vendor Advisory
https://github.com/concretecms/concretecms/pull/12826/changes/167f16e4805d8ab546d2997c753ac21bf4854920://	Broken Link

Configurations

Configuration 1 (hide)

cpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-04 02:15

Updated : 2026-06-17 10:43

NVD link : CVE-2026-3452

Mitre link : CVE-2026-3452

CVE.ORG link : CVE-2026-3452

JSON object : View

Products Affected

concretecms

concrete_cms

CWE

CWE-502

Deserialization of Untrusted Data

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Thanks\u00a0YJK ( @YJK0805 https://hackerone.com/yjk0805 ) of ZUSO ART https://zuso.ai/ \u00a0for reporting."}, {"lang": "es", "value": "Concrete CMS en versiones anteriores a la 9.4.8 es vulnerable a ejecuci\u00f3n remota de c\u00f3digo mediante inyecci\u00f3n de objetos PHP almacenados en el bloque Express Entry List a trav\u00e9s del par\u00e1metro columns. Un administrador autenticado puede almacenar datos serializados controlados por el atacante en campos de configuraci\u00f3n de bloques que posteriormente se pasan a unserialize() sin restricciones de clase ni comprobaciones de integridad. El equipo de seguridad de Concrete CMS asign\u00f3 a esta vulnerabilidad una puntuaci\u00f3n CVSS v.4.0 de 8.9 con el 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. Gracias a YJK ( @YJK0805 https://hackerone.com/yjk0805 ) de ZUSO ART https://zuso.ai/ por informar."}], "lastModified": "2026-06-17T10:43:36.453", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BCBFD93E-6A10-4E9F-A31E-4A2C1FCD367C", "versionEndExcluding": "9.4.8"}], "operator": "OR"}]}], "sourceIdentifier": "ff5b8ace-8b95-4078-9743-eac1ca5451de"}