CVE-2025-34100 CRITICAL

CVE-2025-34100: BuilderEngine 3.5.0 RCE via Unauthenticated Arbitrary File Upload

Vendor Builderengine
Product CMS
Weakness CWE-434 · Unrestricted file upload
Published July 10, 2025
Last update April 7, 2026

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS 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

What the vulnerability does

01Description

An unrestricted file upload vulnerability exists in BuilderEngine 3.5.0 via the integration of the elFinder 2.0 file manager and its use of the jQuery File Upload plugin. The plugin fails to properly validate or restrict file types or locations during upload operations, allowing an attacker to upload a malicious .php file and subsequently execute arbitrary PHP code on the server under the context of the web server process. While the root vulnerability lies within the jQuery File Upload component, BuilderEngine’s improper integration and lack of access controls expose this functionality to unauthenticated users, resulting in full remote code execution.

Key dates

02Disclosure timeline

July 10, 2025 CVE published
April 7, 2026 Record updated