CVE-2021-47732

MEDIUM

Cmsimple - XSS

Title source: rule

Description

CMSimple 5.2 contains a stored cross-site scripting vulnerability in the Filebrowser External input field that allows attackers to inject malicious JavaScript. Attackers can place unfiltered JavaScript code that executes when users click on Page or Files tabs, enabling persistent script injection.

Exploits (1)

exploitdb WRITEUP

by Quadron Research Lab · textwebappsphp

https://www.exploit-db.com/exploits/49751

View Code ZIP pw:eip

References (3)

[Exploit] https://www.exploit-db.com/exploits/49751

[Product] https://www.cmsimple.org/en/

[Third Party Advisory] https://www.vulncheck.com/advisories/cmsimple-stored-cross-site-scripting-via-filebrowser-external-input

Scores

CVSS v3 6.1

EPSS 0.0002

EPSS Percentile 3.4%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation poc

Automatable no

Technical Impact partial

Details

CWE

CWE-79

Status published

Products (2)

cmsimple/cmsimple 5.2

CMSimple/CMSimple CMSimple 5.2

Published Dec 23, 2025

Tracked Since Feb 18, 2026