The WP Live Chat Support plugin before 8.0.33 for WordPress accepts certain REST API calls without invoking the wplcapipermissioncheck protection mechanism.
The wp-live-chat-support plugin before 4.1.0 for WordPress has JavaScript injections.
The wp-live-chat-support plugin before 7.1.05 for WordPress has XSS.
The wp-live-chat-support plugin before 8.0.27 for WordPress has XSS via the GDPR page.
The wp-live-chat-support plugin before 7.1.03 for WordPress has XSS.
The WP Live Chat Support Pro plugin through 8.0.26 for WordPress contains an arbitrary file upload vulnerability. This results from an incomplete patch for CVE-2018-12426. Arbitrary file upload is achieved by using a non-blacklisted executable file extension in conjunction with a whitelisted file extension, and prepending "magic bytes" to the payload to pass MIME checks. Specifically, an unauthenticated remote user submits a crafted file upload POST request to the REST api remoteupload endpoint. The file contains data that will fool the plugin's MIME check into classifying it as an image (which is a whitelisted file extension) and finally a trailing .phtml file extension.
The wp-live-chat-support plugin before 8.0.18 for WordPress has wp-admin/admin.php?page=wplivechat-menu-gdpr-page term XSS.
XSS exists in the wp-live-chat-support v8.0.15 plugin for WordPress via the modules/gdpr.php term parameter in a wp-admin/admin.php wplivechat-menu-gdpr-page request.
The WP Live Chat Support Pro plugin before 8.0.07 for WordPress is vulnerable to unauthenticated Remote Code Execution due to client-side validation of allowed file types, as demonstrated by a v1/remoteupload request with a .php filename and the image/jpeg content type.
There is stored cross site scripting in the wp-live-chat-support plugin before 8.0.08 for WordPress via the "name" (aka wplcname) and "email" (aka wplcemail) input fields to wp-json/wplivechatsupport/v1/startchat whenever a malicious attacker would initiate a new chat with an administrator. NOTE: this issue exists because of an incomplete fix for CVE-2018-9864.
Cross-site scripting vulnerability in WP Live Chat Support prior to version 7.0.07 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.