XSS in Cmsimple
CVE-2021-47732
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (17.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 17.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: -0.000
Affected products
- Cmsimple — versions CMSimple 5.2, 5.2
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/49751 (Exploit, exploit)
- www.cmsimple.org/en/ (Product, product)
- www.vulncheck.com/advisories/cmsimple-stored-cross-site-scripting-via-filebrows… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2021-47732?
- CVE-2021-47732 is a medium-severity vulnerability in Cmsimple, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-12-23.
- How severe is CVE-2021-47732?
- Medium severity. CVSS v3 base score is 6.1 out of 10.