Stored XSS in Event Management Tickets Booking By Event Monster plugin for WordPress

1) Stored cross-site scripting

EUVDB-ID: #VU18620

Risk: Medium

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: N/A

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 (1) form-first-name, form-last-name, form-phone and (2) em_upload_image, logo_size, em_logo_size, em_date_time_heading, em_organizer_heading, em_orginizer_name[], em_value_email HTTP POST parameters, when adding an event. A remote attacker can send a specially crafted HTTP request, permanenlty store arbitrary HTML and script code and execute in 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 updates from vendor's website.

Vulnerable software versions

Event Management Tickets Booking By Event Monster: 1.0.0 - 1.0.5

External links

http://docs.google.com/document/d/1rlijr98h9jReuY85eX00JgvNQHKRhzl4I5bRypMA490/edit
http://plugins.trac.wordpress.org/changeset/2095474/event-monster

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.