Stored cross-site scripting in WP Live Chat Support - CVE-2018-9864
Published: May 17, 2019
Vulnerability identifier: #VU18517
CSH Severity: Medium
CVSS v4: 5.1 [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]
CVE-ID: CVE-2018-9864
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The 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 Name field. A remote attacker can permanently store and execute arbitrary HTML and script code in user's browser in context of vulnerable website, when chat history is viewed by website administrators.
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.
Affected software
WP Live Chat Support
How to mitigate CVE-2018-9864
Install update from vendor's website.
WP Live Chat Support - update to 8.0.06