Missing Authorization in Advantech WebAccess SCADA

Published: 2021-10-13
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-38431
Exploitation vector Network
Public exploit N/A
Vulnerable software
Server applications / SCADA systems

Vendor Advantech Co., Ltd

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Missing Authorization

EUVDB-ID: #VU57330

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-38431

CWE-ID: CWE-862 - Missing Authorization

Exploit availability: No


The vulnerability allows a remote attacker to bypass security restrictions on the target system. 

The vulnerability exists due to missing authorization. A remote authenticated attacker can use API functions to disclose project names and paths from other users.


Install updates from vendor's website.

Vulnerable software versions

WebAccess/SCADA: 9.0.0, 9.0.1, 9.0.2, 9.0.3

CPE2.3 External links


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.