Arbitrary file upload in Jcd Windu Cms
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.
Vulnerability class: Unrestricted File Upload
EPSS: 0.006 (48.0th percentile) — read the EPSS interpretation.
Affected products
- Jcd Windu Cms — versions 4.1
Weakness classification (CWE)
References
- cvd@cert.pl (third-party-advisory)
- cvd@cert.pl (product)