Remote Code Execution vulnerability in Windu CMS
CVE-2026-57311

5.3MEDIUM

Key Information:

Vendor

Jcd

Status
Windu Cms
Vendor
CVE Published:
20 July 2026

What is CVE-2026-57311?

Windu CMS fails to validate the types of files uploaded by authenticated users, allowing a potential attacker to upload malicious files, including PHP scripts. This oversight can enable unauthorized remote code execution on the server. While the vulnerability has been confirmed in version 4.1, it may also affect other versions of the product. Immediate action is advised for users to secure their installations.

Affected Version(s)

Windu CMS 4.1

References

https://cert.pl/posts/2026/07/CVE-2026-57309
third-party-advisory
https://windu.org
product

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Jakub Lipiński
Marek Tołczyk
Kamil KrĂłlikowski
.