Vulnerability identifier: #VU27474

Vulnerability risk: Medium

CVSSv3.1: 6.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H/E:P/RL:U/RC:C]

CVE-ID: CVE-2020-12469

CWE-ID: CWE-502

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Subrion CMS
Web applications / CMS

Vendor: Intelliants

Description

The vulnerability allows a remote attacker to delete arbitrary files.

The vulnerability exists in "admin/blocks.php" file due to insecure input validation when processing serialized data in the subpages value within a block to blocks/edit. A remote authenticated attacker can pass specially crafted data to the application, cause PHP Object Injection and delete arbitrary files on the target system.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Subrion CMS: 4.2.1

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External links
http://github.com/belong2yourself/vulnerabilities/tree/master/Subrion%20CMS/Insecure%20Deserialization/Subpages%20-%20Authenticated%20PHP%20Object%20Injection

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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?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.