#VU54294 OS Command Injection in Inkdrop - CVE-2021-20745

Vulnerability identifier: #VU54294

Vulnerability risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2021-20745

CWE-ID: CWE-78

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Inkdrop
Web applications / Modules and components for CMS

Vendor: Takuya Matsuyama

Description

The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation within "iframe". A remote unauthenticated attacker can pass specially crafted data to the application and execute arbitrary OS commands on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Inkdrop: 5.0.0 - 5.3.0

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External links
https://jvn.jp/en/jp/JVN29949691/index.html

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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.