Stored cross-site scripting in Events Manager WordPress Plugin

1) Stored cross-site scripting

EUVDB-ID: #VU14723

Risk: Low

CVSSv3.1: 5.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-9020

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

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 passed via the events-manager.js mapTitle parameter in the Google Maps miniature. A remote attacker can trick the victim to follow a specially specially crafted link 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

Events Manager WordPress Plugin: 5.8.0.1 - 5.8.1.1

External links

http://wp-events-plugin.com/blog/2018/01/15/events-manager-5-8-1-2-security-release/
http://wordpress.org/plugins/events-manager/#developers
http://www.gubello.me/blog/events-manager-authenticated-stored-xss/ 
http://www.youtube.com/watch?v=40d7uXl36O4

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?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.