CVE-2025-34100
Published: 10 July 2025
Summary
CVE-2025-34100 is a critical-severity Improper Input Validation (CWE-20) vulnerability in Githubusercontent (inferred from references). Its CVSS base score is 9.3 (Critical).
Operationally, ranked in the top 0.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
An unrestricted file upload vulnerability affects BuilderEngine version 3.5.0 through its integration of the elFinder 2.0 file manager and the underlying jQuery File Upload plugin. The plugin does not validate file types or upload locations, enabling an attacker to place a malicious .php file on the server and execute arbitrary PHP code under the web server process privileges. BuilderEngine's integration omits access controls that would otherwise restrict this functionality, exposing it directly to remote users. The issue maps to CWE-20, CWE-306, and CWE-434 and carries a CVSS 4.0 score of 9.3.
Unauthenticated attackers can exploit the flaw over the network without user interaction or credentials. Successful exploitation grants full remote code execution on the affected server, allowing complete compromise of the web application and underlying host.
Public exploit code is available, including a Metasploit module and an entry on Exploit-DB, along with detailed write-ups from VulnCheck and Alert Logic. The EPSS score currently stands at 0.7935, matching its recorded peak and indicating substantial exploitation interest.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-21028
Vulnerability details
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…
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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.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Requires established identification and authentication to unlock, mitigating missing authentication for continued system access.
Requiring identification and rationale for actions allowed without authentication ensures critical functions are not left unprotected by forcing review of authentication requirements.
Authorizing mobile device connections to organizational systems ensures authentication is performed for this critical access function.
Guarantees critical functions are protected by mandatory invocation of the access control mechanism.
Auditing sessions makes it possible to detect access to critical functions without required authentication.
The assessment process confirms authentication is present and effective for critical functions, preventing exploitation from missing authentication.
Certification assesses that critical functions have required authentication controls in place.
Disabling non-essential functions and services eliminates the need to secure them, reducing exposure from missing authentication on unnecessary components.