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CVE-2026-8347

Published: May 22, 2026Updated: Jul 23, 2026 Sources: CVE List NVDCWE-639
4.3MEDIUM
NVD MITRE
EPSS Score
0.2%
Top 86.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

Concrete CMS 9.5.0 and below is vulnerable to IDOR + wrong-authorization-level in the Express association Reorder dialog.  This can cause Cross-entity state tampering with view-only permission on one entry. To be affected, a website has to be using express and relying on express entity ordering. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Winston Crooker for reporting.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:NI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-639

Affected Products

concretecms
oss-projectaka concrete cms
concrete cms
Web & CMS Plugins
Concrete CMS
commercialaka concrete5
Concrete CMS
Web & CMS Plugins

Exploitability

Official Patch Available
Is your org exposed to CVE-2026-8347?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

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

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