CVE-2026-8427
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/backend/file removeFavoriteFolder($id). 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
Probability:
Percentile:
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-2026-8427
EUVD
EUVD-2026-31368
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
CWE Icon
KEV
KEV Icon
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.
Attack-Flow Graph
AI Quick Actions
Instant insights powered by AI
Impact Analysis

The impact of this vulnerability is relatively low, as indicated by its CVSS score of 2.3. It could allow an attacker to cause an authenticated user to remove a favorite folder unintentionally, potentially disrupting user experience or organization of files within Concrete CMS.

Executive Summary

This vulnerability affects Concrete CMS versions before 9.5.0 and is a Cross Site Request Forgery (CSRF) issue. It occurs in the backend controller function removeFavoriteFolder($id), which allows an attacker to trick an authenticated user into performing unwanted actions without their consent.

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-8427. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart