CVE-2026-8327

Concrete CMS below 9.5.0 and below is vulnerable to password change without reauthorization and session-hardening bypass. The user-profile edit controller passes the entire raw POST array to UserInfo::update() without field whitelisting resulting in password change without requiring the current password and also resulting in registered users able to disable the per-user-IP-pinning in the session validator which is meant to detect hijacking. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 5.3 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks 0x4c616e for reporting.

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes	Release Notes

Configurations

Configuration 1 (hide)

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

History

No history.

Information

Published : 2026-05-21 22:16

Updated : 2026-07-23 16:10

NVD link : CVE-2026-8327

Mitre link : CVE-2026-8327

CVE.ORG link : CVE-2026-8327

JSON object : View

Products Affected

concretecms

concrete_cms

CWE

CWE-269

Improper Privilege Management

CWE-620

Unverified Password Change

CWE-915

Improperly Controlled Modification of Dynamically-Determined Object Attributes

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Thanks\u00a00x4c616e for reporting."}, {"lang": "es", "value": "Concrete CMS en versiones 9.5.0 e inferiores es vulnerable a un cambio de contrase\u00f1a sin reautorizaci\u00f3n y a la elusi\u00f3n del endurecimiento de sesi\u00f3n. El controlador de edici\u00f3n de perfil de usuario pasa todo el array POST en bruto a UserInfo::update() sin lista blanca de campos, lo que resulta en un cambio de contrase\u00f1a sin requerir la contrase\u00f1a actual y tambi\u00e9n en que los usuarios registrados pueden deshabilitar el anclaje de IP por usuario en el validador de sesi\u00f3n, que est\u00e1 destinado a detectar el secuestro. El equipo de seguridad de Concrete CMS otorg\u00f3 a esta vulnerabilidad una puntuaci\u00f3n CVSS v.4.0 de 5.3 con el vector CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Gracias a 0x4c616e por informar."}], "lastModified": "2026-07-23T16:10:00.137", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2E0D5AA2-E073-464B-9026-9A428B24ABFA", "versionEndExcluding": "9.5.1"}], "operator": "OR"}]}], "sourceIdentifier": "ff5b8ace-8b95-4078-9743-eac1ca5451de"}