Vulnerability identifier: #VU26697

Vulnerability risk: Low

CVSSv3.1: 5.6 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-11508

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
WordPress Landing Page – Squeeze Page – Responsive Landing Page Builder Free – WP Lead Plus X
Web applications / Modules and components for CMS

Vendor: Landing Pages Builder Free

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data in the "core37_lp_save_page" AJAX action. A remote authenticated attacker can inject and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation
Install update from vendor's website.

Vulnerable software versions

WordPress Landing Page – Squeeze Page – Responsive Landing Page Builder Free – WP Lead Plus X: 0.1 - 0.98

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External links
http://www.wordfence.com/blog/2020/04/critical-vulnerabilities-in-the-wp-lead-plus-x-wordpress-plugin/
http://wpvulndb.com/vulnerabilities/10167/

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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.