Medium severity · published May 16, 2026
CVE-2020-37238
CMS Made Simple 2.2.15 Stored XSS via SVG File Upload
6.4
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 15% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CM
CMS Made Simple · Cmsmadesimple
2.2.15 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-37238
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-37238
www.cmsmadesimple.org
https://www.cmsmadesimple.org/
www.cmsmadesimple.org
https://www.cmsmadesimple.org/downloads
www.exploit-db.com
https://www.exploit-db.com/exploits/49199
www.vulncheck.com
https://www.vulncheck.com/advisories/cms-made-simple-stored-xss-via-svg-file-upload
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