SB2019101703 - Stored cross-site scripting in Events Manager plugin for WordPress

Description

This security bulletin contains information about 1 vulnerability.

1) Stored cross-site scripting (CVE-ID: CVE-2019-16523)

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:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P/U:Clear

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

The vulnerability exists due to improper encoding and insertion of data provided to the "map_style" attribute of shortcodes ("locations_map" and "events_map"). A remote authenticated attacker can permanently 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.

Remediation

Install update from vendor's website.

References

• https://github.com/sbaresearch/advisories/tree/public/2019/SBA-ADV-20190913-03_WordPress_Plugin_Events_Manager
• https://wordpress.org/plugins/events-manager/#developers