CVE-2021-47732

MEDIUM 6.1

CMSimple 5.2 Stored Cross-Site Scripting via Filebrowser External Input

CVSS Score

6.1

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-79
Vendor	cmsimple
Product	cmsimple
Published	Dec 23, 2025
Last Updated	Apr 7, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

CMSimple / CMSimple

CMSimple 5.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

exploit-db.com: https://www.exploit-db.com/exploits/49751 cmsimple.org: https://www.cmsimple.org/en/ vulncheck.com: https://www.vulncheck.com/advisories/cmsimple-stored-cross-site-scripting-via-filebrowser-external-input

Credits

Quadron Research Lab