SB2019052709 - Stored XSS in Event Management Tickets Booking By Event Monster plugin for WordPress

Description

This security bulletin contains information about 1 vulnerability.

1) Stored cross-site scripting (CVE-ID: N/A)

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

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P/U:Green

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.

Remediation

Install update from vendor's website.

References

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