CVE-2026-57311
MediumCVSS 5.3Exploitation Probability (EPSS)
Low risk30th percentile - higher than 30% of all known CVEs
Summary
Windu CMS does not validate uploaded file types, allowing an authenticated attacker to upload arbitrary files, including PHP. This can lead to Remote Code Execution (RCE). Confirmed in version 4.1, but other versions may be affected.
Risk Assessment
An authenticated attacker can gain full server control by uploading a malicious PHP file and executing it.
Recommendation
Restrict file uploads to allowed types immediately and apply available patches or replace the CMS with a more secure solution.
Other vulnerabilities in Windu CMS
See all- CVE-2026-57309Critical
A Blind SQL injection vulnerability has been found in Windu CMS. An unauthenticated remote attacker can inject SQL syntax into the URL path in HTTP headers. Confirmed in version 4.1, but other versions may also be affected.
- CVE-2026-57310Medium
Windu CMS uses hashing algorithms based on MD5 and SHA1 with static salt to store user passwords. This allows an attacker who obtains a password hash to decode user credentials. The vulnerability has been confirmed in version 4.1 but may affect other versions.
Original NVD description (English source)
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.