Improper access control in Flexible Checkout Fields for WooCommerce plugin for WordPress

1) Improper access control

EUVDB-ID: #VU25627

Risk: High

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

CVE-ID: N/A

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions. A remote attacker can bypass implemented security restrictions and inject new fields and scripts into the WooCommerce checkout page.

Note: the vulnerability is being actively exploited in the wild.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Flexible Checkout Fields for WooCommerce: 0.9 - 2.3.1

CPE2.3

• cpe:2.3:a:wpdesk:flexible-checkout-fields:0.9:*:*:*:*:wordpress:*:*
• cpe:2.3:a:wpdesk:flexible-checkout-fields:0.9.1:*:*:*:*:wordpress:*:*
• cpe:2.3:a:wpdesk:flexible-checkout-fields:0.9.2:*:*:*:*:wordpress:*:*

External links

http://wpvulndb.com/vulnerabilities/10093/
http://blog.nintechnet.com/zero-day-vulnerability-fixed-in-wordpress-flexible-checkout-fields-for-woocommerce-plugin
http://wordpress.org/support/topic/malicious-access-plugin-woo-add-to-carts-by-linkflowusers/
http://www.wordfence.com/blog/2020/02/site-takeover-campaign-exploits-multiple-zero-day-vulnerabili...

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?

Yes. This vulnerability is being exploited in the wild.