CVE-2026-8327 Details
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.
A vulnerability exists in Concrete CMS versions prior to 9.5.0 that allows users to change passwords without proper authorization and bypass session hardening measures. The issue arises because the user-profile edit controller transmits the entire raw POST array to the UserInfo::update() method without implementing field whitelisting. This flaw enables password changes without requiring the current password and allows registered users to disable the per-user IP pinning in the session validator, a feature designed to detect session hijacking.
Users can upgrade to Concrete CMS version 9.5.0 or later to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 22, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes | ConcreteCMS | Release Notes |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-269 | Improper Privilege Management | ConcreteCMS |
| CWE-620 | Unverified Password Change | ConcreteCMS |
| CWE-915 | Improperly Controlled Modification of Dynamically-Determined Object Attributes | ConcreteCMS |
Affected Products
| Product | Versions |
|---|---|
| concretecms concrete cms | < 9.5.1 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 23, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | ConcreteCMS |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 26, 2026 | Initial Analysis | [email protected] |
| May 21, 2026 | New CVE Received | ConcreteCMS |