Vulnerability identifier: #VU61537

Vulnerability risk: High

CVSSv3.1: 7.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-26600

CWE-ID: CWE-287

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
ImpressCMS
Web applications / CMS

Vendor: The ImpressCMS Project

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in when processing authentication requests within the "/plugins/preloads/autologin.php" script. A remote attacker can bypass authentication process and gain unauthorized access to the application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

ImpressCMS: 1.0.0 - 1.4.2

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External links
http://karmainsecurity.com/KIS-2022-01
http://hackerone.com/reports/1081986

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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