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CVE-2025-34100

BuilderEngine 3.5.0 RCE via Unauthenticated Arbitrary File Upload

CVSS 9.3 CRITICALEPSS 2.3%CWE-20CWE-306CWE-434
Vexday Risk Score
63High priority
SSVC decision (CISA)
Attend
PoC available → attend closely
CVSS 9.3EPSS 2.3%KEV nãoPoC públicaNuclei —Metasploit simPatch —
Lifecycle
18 Sep 2016Metasploit module available
10 Jul 2025Published on NVD
02 Aug 2025Public PoC
Recommendation: Plan a near-term fix — a public PoC already exists.
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.
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
Affected products
BuilderEngine · CMS
public PoCs found — 4
githubgithub.com/RyanJohnJames/CVE-2025-34100-demo★ 0githubgithub.com/hyeonyeonglee/CVE-2025-34100★ 0cve_referenceraw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/multi/http/builderengine_upload_exec.rbunverifiedcve_referencewww.exploit-db.com/exploits/40390unverified
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

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References
https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/multi/http/builderengine_upload_exec.rbhttps://support.alertlogic.com/hc/en-us/articles/115004703183-BuilderEngine-Content-Management-System-CMS-elFinder-2-0-Arbitrary-File-Uploadhttps://vulncheck.com/advisories/builder-engine-unauthenticated-arbitrary-file-uploadhttps://www.exploit-db.com/exploits/40390