XSS in Cmsmadesimple Cms Made Simple
CVE-2020-37238
CMS Made Simple 2.2.15 contains a stored cross-site scripting vulnerability that allows authenticated users with Content Manager access to inject malicious scripts through SVG file uploads. Attackers can upload SVG files containing embedded JavaScript to the file manager, which executes when other authenticated users access the uploaded file, enabling cookie theft and session hijacking.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (13.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 13.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Cmsmadesimple Cms Made Simple — versions 2.2.15
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/49199 (exploit)
- www.cmsmadesimple.org/ (product)
- www.cmsmadesimple.org/downloads (product)
- www.vulncheck.com/advisories/cms-made-simple-stored-xss-via-svg-file-upload (third-party-advisory)
Frequently asked questions
- What is CVE-2020-37238?
- CVE-2020-37238 is a medium-severity vulnerability in Cmsmadesimple Cms Made Simple, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-05-16.
- How severe is CVE-2020-37238?
- Medium severity. CVSS v3 base score is 6.4 out of 10.