Vulnerability identifier: #VU27242

Vulnerability risk: Low

CVSSv3.1: 5.8 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2020-12077

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
MapPress Maps for WordPress
Web applications / Modules and components for CMS

Vendor: Chris Richardson

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 on AJAX actions that called functions lacking capability checks and nonce checks. A remote authenticated attacker can inject and execute arbitrary HTML and script code in user's browser in context of vulnerable website, leads to map deletion and creation.

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. 

This vulnerability affects the following AJAX hooks:

add_action('wp_ajax_mapp_delete', array(__CLASS__, 'ajax_delete'));
add_action('wp_ajax_mapp_save', array(__CLASS__, 'ajax_save'));

Mitigation
Install updates from vendor's website.

Vulnerable software versions

MapPress Maps for WordPress: 2.40 - 2.53.8

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External links
http://wordpress.org/plugins/mappress-google-maps-for-wordpress/#developers
http://wpvulndb.com/vulnerabilities/10187/
http://www.wordfence.com/blog/2020/04/critical-vulnerabilities-patched-in-mappress-maps-plugin/

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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.