The SupportCandy – AI Customer Support Ticket System & Live Chatbot Agent plugin for WordPress is vulnerable to time-based SQL Injection via the 'sortby' parameter in all versions up to, and including, 3.5.3 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with custom-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. Exploitation requires the authenticated attacker to hold both a Subscriber-level (or higher) WordPress role and a SupportCandy Agent account with the 'Assign Agents' permission configured.

The SupportCandy – AI Customer Support Ticket System & Live Chatbot Agent plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'name' parameter in all versions up to, and including, 3.5.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This exploit chain requires the 'Register user if not exists' setting to be disabled, which is its default configuration.

The SupportCandy WordPress plugin before 3.5.3 does not validate a submitted per-ticket authorization code before disclosing the real code to the requester, allowing unauthenticated users to read the contents of any support ticket.

The SupportCandy – Helpdesk & Customer Support Ticket System plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 3.3.7. This is due to missing rate limiting on the OTP verification for guest login. This makes it possible for unauthenticated attackers to bypass authentication and gain unauthorized access to customer support tickets by brute forcing the 6-digit OTP code.

The SupportCandy – Helpdesk & Customer Support Ticket System plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 3.3.0 via file upload due to missing validation on a user controlled key. This makes it possible for authenticated attackers to download attachments for support tickets that don't belong to them. If an admin enables tickets for guests, this can be exploited by unauthenticated attackers.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in SupportCandy allows Stored XSS.This issue affects SupportCandy: from n/a through 3.2.3.

The SupportCandy WordPress plugin before 3.1.7 does not properly sanitise and escape the agents[] parameter in the setaddagentleaves AJAX function before using it in a SQL statement, leading to a SQL injection exploitable by high privilege users such as admin.

The SupportCandy WordPress plugin before 3.1.7 does not properly sanitise and escape the id parameter for an Agent in the REST API before using it in an SQL statement, leading to an SQL Injection exploitable by users with a role as low as Subscriber.

The SupportCandy WordPress plugin before 3.1.5 does not validate and escape user input before using it in an SQL statement, which could allow unauthenticated attackers to perform SQL injection attacks

The SupportCandy WordPress plugin before 2.2.7 does not validate and escape the page attribute of its shortcode, which could allow users with a role as low as Contributor to perform Cross-Site Scripting attacks

The SupportCandy WordPress plugin before 2.2.7 does not have CSRF check in the wpsctickets AJAX action, nor has any sanitisation or escaping in some of the filter fields which could allow attackers to make a logged in user having access to the ticket lists dashboard set an arbitrary filter (stored in their cookies) with an XSS payload in it.

The SupportCandy WordPress plugin before 2.2.7 does not sanitise and escape the query string before outputting it back in pages with the [wpsccreateticket] shortcode embed, leading to a Reflected Cross-Site Scripting issue

The SupportCandy WordPress plugin before 2.2.7 does not have CRSF check in its wpsctickets AJAX action, which could allow attackers to make a logged in admin call it and delete arbitrary tickets via the setdeletepermanentlybulkticket settingaction.

The SupportCandy WordPress plugin before 2.2.5 does not have authorisation and CSRF checks in its wpsctickets AJAX action, which could allow unauthenticated users to call it and delete arbitrary tickets via the setdeletepermanentlybulkticket settingaction. Other actions may be affected as well.

An Unrestricted File Upload Vulnerability in the SupportCandy plugin through 2.0.0 for WordPress allows remote attackers to execute arbitrary code by uploading a file with an executable extension.