PHP Object Injection in Welcart e-Commerce plugin for WordPress

1) PHP Object Injection

EUVDB-ID: #VU48209

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-28339

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: No

Description

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

The vulnerability exists due to the affected plugin unserialises the content of the "usces_cookie" cookie via "usces_unserialize()". A remote authenticated attacker can send a specially crafted request and execute arbitrary code 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

Welcart e-Commerce: 0.7 - 1.9.35

External links

http://wordpress.org/plugins/usc-e-shop/#developers
http://www.wordfence.com/blog/2020/11/object-injection-vulnerability-in-welcart-e-commerce-plugin/

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.