CVE-2026-57311

Published Jul 20, 2026 Modified Jul 20, 2026 CWE-434

Description

Windu CMS does not validate types of uploaded files. An authenticated attacker can upload arbitrary files, including PHP. This can lead to Remote Code Execution. Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 4.1 but may also affect other versions.

Is your site exposed to CVE-2026-57311?

Run a free security scan — no signup, results in seconds.

Weakness Type (CWE)

CWE-434 Unrestricted Upload

References

Frequently Asked Questions

What is CVE-2026-57311? +
Windu CMS does not validate types of uploaded files. An authenticated attacker can upload arbitrary files, including PHP. This can lead to Remote Code Execution. Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 4.1 but may also affect other versions.
How do I check if I'm vulnerable to CVE-2026-57311? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

Don't wait for an exploit

Scan your website for vulnerabilities like CVE-2026-57311 — free, no signup required.