CVE-2023-28820

medium

Description

Concrete CMS (previously concrete5) before 9.1 is vulnerable to stored XSS in RSS Displayer via the href attribute because the link element input was not sanitized.

References

https://www.concretecms.org/about/project-news/security/concrete-cms-security-advisory-2023-04-20

https://github.com/concretecms/concretecms/releases

Details

Source: Mitre, NVD

Published: 2023-04-28

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 5.4

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N