CVE-2025-34100Disclosure

LOWCVSS 9.3 · CRITICAL

Exploit discussion active in current signal (1 latest mentions)

Immediate actions

Hunt for exploitation attempts and persistence artifacts
Increase monitoring for publicly documented tradecraft
Track advisory updates for patch or workaround availability

Recommended action window: High priority (within 72h)

NVD 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.

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1.5/ 10 priority

Sources & remediation

Other references

Weakness type (CWE)

CWE-20CWE-306CWE-434

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

NONE

Momentum

NONE

Threat summary

Public PoC is present in monitored signal
1 mentions across 1 observed day

What's happening

PoC mentioned or linked in 1 signal
Technical details provided in 1 signal
Disclosure: 1 classified signal
1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d

Signal classification1 categories

Disclosure

1100.0%

Referenced assets1 URL

By indicator

https://zerodaysignal.com/vulnerability/CVE-2025-34100

Full discourse1 post

0day Signal@0dayPublishing184d
Disclosure
🚨 CVE-2025-34100: BuilderEngine 3.5... Unauthenticated RCE through elFinder's jQuery upload plugin - drop a PHP shell, own the box in seconds. #RCE #FileUpload #CriticalRCE. https://zerodaysignal.com/vulnerability/CVE-2025-34100 #netsec #vulnerability #CVE #sysadmin #zeroday
Post summary
The post announces CVE-2025-34100, highlighting an unauthenticated RCE in elFinder’s jQuery upload plugin that allows PHP shell upload, and provides a link to a vulnerability page, but gives no evidence of active exploitation, patches, or detailed exploit code.
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