PT-2026-42570 · Unknown · Concrete Cms

Yonatan Drori · Published 2026-05-21 · Updated 2026-05-22 · CVE-2026-8414

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Concrete CMS versions 9.0.0 through 9.4.x

Description Cross Site Request Forgery (CSRF) occurs at the 'concrete/controllers/dialog/event/duplicate' endpoint. CSRF is a flaw that allows an attacker to trick a victim into performing actions they did not intend to do.

Recommendations Update to version 9.5.0 or later. As a temporary workaround, restrict access to the 'concrete/controllers/dialog/event/duplicate' endpoint.

Fix

CSRF

Weakness Enumeration

CWE-1275

CWE-352

Related Identifiers

CVE-2026-8414

Affected Products

Concrete Cms

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-8414 · Security Note
• https://t.me/CVEtracker/54568 · Telegram Post
• https://twitter.com/CVEnew/status/2057783200529654075 · Twitter Post
• https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes · Note