Concrete CMS (previously concrete5) versions 8.5.12 and below, 9.0.0 through 9.0.2 is vulnerable to Stored XSS in uploaded file and folder names.
https://www.concretecms.org/about/project-news/security/concrete-cms-security-advisory-2023-04-20
https://www.concretecms.org/about/project-news/security/2023-11-09-security-blog-about-updated-cves-and-new-release
https://github.com/concretecms/concretecms/releases
Source: Mitre, NVD
Published: 2023-04-28
Updated: 2026-06-17
Base Score: 5.5
Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:N
Severity: Medium
Base Score: 5.4
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
EPSS: 0.00553