CVE-2023-28820

—

CVSS 3.1

5.4 medium

EPSS

<1%p33

Published

Apr 28, 2023 (Apr 28, 2023)

Modified

Jun 17, 2026

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.

Vendors: concretecms
Products: concrete cms
Weakness: CWE-79
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

NVD CVE.org GitHub PoCs EPSS (0.4%)

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