InnovaStudio WYSIWYG Editor 5.4 Unrestricted File Upload via Filename Manipulation

Advisories

severity: critical
date: December 19, 2025
Affecting: WYSIWYG Editor <= 5.4
CVE: CVE-2023-53950
CWE: CWE-434 Unrestricted Upload of File with Dangerous Type
CVSS: 9.3
CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
References: ExploitDB-51362
Official Vendor Homepage
Credit: Zer0FauLT
Description: InnovaStudio WYSIWYG Editor 5.4 contains an unrestricted file upload vulnerability that allows attackers to bypass file extension restrictions through filename manipulation. Attackers can upload malicious ASP shells by using null byte techniques and alternate file extensions to circumvent upload controls in the asset manager.