What’s Vulnerable › Vulnerabilities

CVE-2021-47732: CMSimple 5.2 Stored Cross-Site Scripting via Filebrowser External Input

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-12-23 · updated 2026-06-17
• Weakness: CWE-79

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.

Affected products

• CMSimple: 5.2

References

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

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