Cyber Resilience

CVE-2025-8323

High

Published: 30 July 2025

Published
30 July 2025
Modified
15 April 2026
KEV Added
—
Patch
—
CVSS Score v4 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0097 77.1th percentile
Risk Priority 18 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-8323 is a high-severity Unrestricted Upload of File with Dangerous Type (CWE-434) vulnerability in Org (inferred from references). Its CVSS base score is 8.7 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 22.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Deeper analysis

CVE-2025-8323 is an Arbitrary File Upload vulnerability in the e-School software from Ventem. Published on 2025-07-30, it carries a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) and maps to CWE-434 (Unrestricted Upload of File with Dangerous Type). The issue enables unauthenticated remote attackers to upload web shell backdoors and execute them, resulting in arbitrary code execution on the affected server.

An unauthenticated remote attacker can exploit this vulnerability over the network with low attack complexity and no user interaction. Successful exploitation allows the attacker to upload malicious files, such as web shells, and execute arbitrary code on the server, potentially granting full control over the system and leading to high impacts on confidentiality, integrity, and availability.

TWCERT advisories provide additional details on this vulnerability, including at https://www.twcert.org.tw/en/cp-139-10307-25cdf-2.html and https://www.twcert.org.tw/tw/cp-132-10306-ccea7-1.html. Security practitioners should consult these for recommended mitigations and patches.

EU & UK References

Vulnerability details

The e-School from Ventem has a Arbitrary File Upload vulnerability, allowing unauthenticated remote attackers to upload and execute web shell backdoors, thereby enabling arbitrary code execution on the server.

CWE(s)
CWE-434

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1505.003 Web Shell Persistence
Adversaries may backdoor web servers with web shells to establish persistent access to systems.
attack.mitre.org →
Why these techniques?

Direct arbitrary file upload of web shells on public-facing app enables T1190 exploitation and T1505.003 web shell deployment for code execution.

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

CVEs Like This One

CVE-2025-46384Shared CWE-434
CVE-2025-13516Shared CWE-434
CVE-2024-13011Shared CWE-434
CVE-2025-21624Shared CWE-434
CVE-2026-35164Shared CWE-434
CVE-2026-2097Shared CWE-434
CVE-2025-12154Shared CWE-434
CVE-2026-42748Shared CWE-434
CVE-2025-32957Shared CWE-434
CVE-2026-33704Shared CWE-434

Affected Assets

Org
—
inferred from references and description; NVD did not file a CPE for this CVE

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-10 Information Input Validation good match
prevent

Directly mitigates unrestricted arbitrary file uploads by enforcing validation of file types and content at input points, preventing web shell backdoors.

SI-2 Flaw Remediation good match
prevent

Requires identification, testing, and installation of patches to remediate the specific arbitrary file upload flaw enabling RCE.

SI-3 Malicious Code Protection good match
preventdetect

Deploys malicious code protection at system entry points to scan and block web shell uploads or execution attempts.

References