Vulnerabilities CVE-2026-8327

CVE-2026-8327

Medium

Open

TLP:CLEAR

Concrete CMS below 9.5.0 and below is vulnerable to password change without reauthorization and session-hardening bypass.

NVD CVE.org

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Description

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.

Details

CVSS Score: 5.3
EPSS Score ⓘ: 0.18%

8th percentile
CVSS 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
Confidence: 90%
Published: May 21, 2026
Last Modified: May 22, 2026

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