CVE-2026-57311: CWE-434 Unrestricted Upload of File with Dangerous Type in JCD Windu CMS
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.
AI Analysis
Technical Summary
CVE-2026-57311 is a vulnerability in Windu CMS 4.1 where the application fails to validate the types of uploaded files. Authenticated attackers can exploit this by uploading arbitrary files, including PHP scripts, which may lead to remote code execution. Attempts to contact the vendor for remediation have been unsuccessful, and no patch or official fix has been published. The vulnerability is classified under CWE-434 (Unrestricted Upload of File with Dangerous Type).
Potential Impact
An authenticated attacker can upload arbitrary files, including executable PHP scripts, which can result in remote code execution on the server hosting Windu CMS 4.1. This can compromise the confidentiality, integrity, and availability of the affected system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict authenticated user permissions to limit file upload capabilities and monitor for suspicious file uploads. Consider disabling file uploads if not required.
CVE-2026-57311: CWE-434 Unrestricted Upload of File with Dangerous Type in JCD Windu CMS
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.
CVSS v4.0
Score 5.3medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-57311 is a vulnerability in Windu CMS 4.1 where the application fails to validate the types of uploaded files. Authenticated attackers can exploit this by uploading arbitrary files, including PHP scripts, which may lead to remote code execution. Attempts to contact the vendor for remediation have been unsuccessful, and no patch or official fix has been published. The vulnerability is classified under CWE-434 (Unrestricted Upload of File with Dangerous Type).
Potential Impact
An authenticated attacker can upload arbitrary files, including executable PHP scripts, which can result in remote code execution on the server hosting Windu CMS 4.1. This can compromise the confidentiality, integrity, and availability of the affected system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict authenticated user permissions to limit file upload capabilities and monitor for suspicious file uploads. Consider disabling file uploads if not required.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- CERT-PL
- Date Reserved
- 2026-06-24T12:12:42.195Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a5e1eb32a4a8d59891652c8
Added to database: 07/20/2026, 13:12:19 UTC
Last enriched: 07/29/2026, 21:35:06 UTC
Last updated: 09/03/2026, 22:52:13 UTC
Views: 100
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