Vulnerability · Published Jul 10, 2025 · Assigned by VulnCheck
CVE-2025-34100BuilderEngine 3.5.0 RCE via Unauthenticated Arbitrary File Upload
Critical 9.3
In plain English
A critical-severity unrestricted file upload in CMS from BuilderEngine. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 3.9% (higher than 90% of all known vulnerabilities). Ready-made attack tooling exists: Metasploit, public proof-of-concept code.
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| BuilderEngine | CMS | 3.5.0 |
Weakness: CWE-434, CWE-20, CWE-306 · 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
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/multi/http/builderengine_upload_exec.rb exploit
- https://www.exploit-db.com/exploits/40390 exploit
- https://support.alertlogic.com/hc/en-us/articles/115004703183-BuilderEngine-Content-Management-System-CMS-elFinder-2-0-Arbitrary-File-Upload third-party-advisory
- https://vulncheck.com/advisories/builder-engine-unauthenticated-arbitrary-file-upload third-party-advisory