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CVE-2026-57311

Unrestricted Upload of File with Dangerous Type in Windu CMS

MEDIUM
5.3
CVSS Score
Published: July 20, 2026 at 12:53 PM UTC
Updated: October 24, 2026 at 08:10 PM UTC
1 product affected across 1 vendorWindu CMS

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

Third Party Advisory
Source: cverecord
https://cert.pl/posts/2026/07/CVE-2026-57309
Product
Source: cverecord
https://windu.org

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMCERT-PL
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-434

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