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CVE Vulnerability Details :
CVE-2026-8327
PUBLISHED
More InfoOfficial Page
Assigner-ConcreteCMS
Assigner Org ID-ff5b8ace-8b95-4078-9743-eac1ca5451de
View Known Exploited Vulnerability (KEV) details
Published At-21 May, 2026 | 21:15
Updated At-22 May, 2026 | 13:15
Rejected At-
▼CVE Numbering Authority (CNA)
Concrete CMS below 9.5.0 and below is vulnerable to password change without reauthorization and session-hardening bypass.

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.

Affected Products
Vendor
Concrete CMS
Product
Concrete CMS
Collection URL
https://github.com/concretecms/concretecms
Repo
https://github.com/concretecms/concretecms
Default Status
unaffected
Versions
Affected
  • From 5 through 9.5.0 (git)
Problem Types
TypeCWE IDDescription
CWECWE-915CWE-915 Improperly controlled modification of Dynamically-Determined object attributes
CWECWE-620CWE-620 Unverified password change
CWECWE-269CWE-269 Improper Privilege Management
Type: CWE
CWE ID: CWE-915
Description: CWE-915 Improperly controlled modification of Dynamically-Determined object attributes
Type: CWE
CWE ID: CWE-620
Description: CWE-620 Unverified password change
Type: CWE
CWE ID: CWE-269
Description: CWE-269 Improper Privilege Management
Metrics
VersionBase scoreBase severityVector
4.05.3MEDIUM
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
Version: 4.0
Base score: 5.3
Base severity: MEDIUM
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
Metrics Other Info
Impacts
CAPEC IDDescription
CAPEC-77CAPEC-77 Manipulating User-Controlled Variables
CAPEC ID: CAPEC-77
Description: CAPEC-77 Manipulating User-Controlled Variables
Solutions
Configurations
Workarounds
Exploits
Credits
finder
0x4c616e
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes
release-notes
Hyperlink: https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes
Resource:
release-notes
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found