CVE-2021-40555

PoC —

CVSS 3.1

5.4 medium

EPSS

<1%p37

Published

Feb 16, 2023 (Feb 16, 2023)

Modified

Jun 17, 2026

Description

Cross site scripting (XSS) vulnerability in flatCore-CMS 2.2.15 allows attackers to execute arbitrary code via description field on the new page creation form.

Vendors: flatcore
Products: flatcore
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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