Vulnerability identifier: #VU66954

Vulnerability risk: Low

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

CVE-ID: CVE-2021-24145

CWE-ID: CWE-434

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Modern Events Calendar Lite
Web applications / Modules and components for CMS

Vendor: Webnus Team

Description

The vulnerability allows a remote user to compromise vulnerable system.

The vulnerability exists due to insufficient validation of content-type when processing files uploads. A remote website administrator can upload an arbitrary PHP file by setting its content-type to "text/csv" and execute it on the server.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Modern Events Calendar Lite: 3.1.1 - 5.16.2

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External links
http://wpscan.com/vulnerability/f42cc26b-9aab-4824-8168-b5b8571d1610
http://packetstormsecurity.com/files/163346/WordPress-Modern-Events-Calendar-5.16.2-Shell-Upload.html
http://packetstormsecurity.com/files/163672/WordPress-Modern-Events-Calendar-Remote-Code-Execution.html

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.