CVE-2026-8414
Analyzed Analyzed - Analysis Complete
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/event/duplicate. 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.
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Meta Information
Published
2026-05-21
Last Modified
2026-05-26
Generated
2026-06-11
AI Q&A
2026-05-22
EPSS Evaluated
2026-06-10
NVD
CVE-2026-8414
EUVD
EUVD-2026-31370
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
concretecms concrete_cms From 9.0.0 (inc) to 9.5.1 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-1275 The SameSite attribute for sensitive cookies is not set, or an insecure value is used.
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.
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Executive Summary

This vulnerability is a Cross Site Request Forgery (CSRF) issue found in Concrete CMS versions before 9.5.0. It occurs specifically at the endpoint concrete/controllers/dialog/event/duplicate. CSRF vulnerabilities allow an attacker to trick a user into performing actions on a web application without their consent, potentially leading to unauthorized operations.

Impact Analysis

The impact of this vulnerability is relatively low, as indicated by its CVSS v4.0 base score of 2.3. It requires user interaction and allows an attacker to potentially cause limited impact by tricking a user into duplicating events without their intention. However, it does not lead to privilege escalation, code execution, or data disclosure.

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