Cross-Site Request Forgery in Concrete CMS

Publication date: 2026-05-21

Last updated on: 2026-05-26

Assigner: ConcreteCMS

Description

Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/dialog/express/association/reorder. 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:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Yonatan Drori (Tenzai) for reporting.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-05-21

Last Modified

2026-05-26

Generated

2026-07-02

AI Q&A

2026-05-22

EPSS Evaluated

2026-06-30

NVD

CVE-2026-8415

EUVD

EUVD-2026-31371

Affected Vendors & Products

Vendor	Product	Version / Range
concretecms	concrete_cms	From 9.0.0 (inc) to 9.5.1 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-352	The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.
CWE-1275	The SameSite attribute for sensitive cookies is not set, or an insecure value is used.

Attack-Flow Graph

Executive Summary

This vulnerability affects Concrete CMS versions before 9.5.0 and is a Cross Site Request Forgery (CSRF) issue. It occurs specifically at the endpoint concrete/controllers/dialog/express/association/reorder. CSRF vulnerabilities allow an attacker to trick a user into performing unwanted actions on a web application in which they are authenticated.

Impact Analysis

The impact of this vulnerability is limited due to its low CVSS score of 2.3. It requires user interaction and can potentially allow an attacker to cause limited unauthorized actions on behalf of the user without their consent. However, it does not lead to privilege escalation, data confidentiality loss, or system compromise.

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