#VU30135 Improper Authentication

Published: 2020-07-16 | Updated: 2022-02-20

Vulnerability identifier: #VU30135

Vulnerability risk: Medium

CVSSv3.1: 8.4 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2020-12812


Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Operating systems & Components / Operating system

Vendor: Fortinet, Inc


The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in when processing authentication requests in SSL VPN. A remote authenticated attacker can changed the case of their username and gain unauthorized access to the application without being prompted for the second factor of authentication (FortiToken).

Install updates from vendor's website.

Vulnerable software versions

FortiOS: 6.0.0 - 6.4.0


External links

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.

Latest bulletins with this vulnerability