CVE-2026-8347
MEDIUMConcrete CMS 9.5.0 and below is vulnerable to IDOR + wrong-authorization-level in Express association Reorder dialog
Title source: cnaDescription
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.
References (1)
Core 1
Core References
Release Notes release-notes
https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes
Scores
CVSS v3
4.3
EPSS
0.0023
EPSS Percentile
13.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-639
Status
published
Products (2)
Concrete CMS/Concrete CMS
5.0 - 9.5.0
concretecms/concrete_cms
< 9.5.1
Published
May 22, 2026
Tracked Since
May 22, 2026