CVE-2026-94539

SupportCandy <= 3.5.3 - Authenticated (Custom+) SQL Injection via 'sort_by' Parameter

2026-10-02 14:05
Adrien Brunner

Strategic Overview

Status
Patched in 3.5.4
Affected Plugin
SupportCandy – AI Customer Support Ticket System & Live Chatbot Agent
Affected Version
<= 3.5.3
CVSS
6.5Medium
Weakness type
CWE-89 · Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
CVE
CVE-2026-94539
View all SupportCandy – AI Customer Support Ticket System & Live Chatbot Agent vulnerabilities

At a glance

CVE-2026-94539 is a medium-severity Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in the SupportCandy WordPress plugin, affecting versions <= 3.5.3. It carries a CVSS score of 6.5 (reachable over the network; low attack complexity; high confidentiality impact). Exploitation requires an authenticated account at Custom level or above. The issue is fixed in version 3.5.4; sites on affected versions should update now. Disclosed October 2026, reported by Adrien Brunner.

Vulnerability Overview

The SupportCandy – AI Customer Support Ticket System & Live Chatbot Agent plugin for WordPress is vulnerable to time-based SQL Injection via the 'sort_by' 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.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user. A successful exploit has high impact on confidentiality.

CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

SupportCandy <= 3.5.3 carries this weakness at sort_by, and reaching it takes an account at Custom level or above. SQL injection happens when request data is concatenated into a query instead of being bound as a parameter, letting an attacker change the structure of the statement rather than just its values.

A working injection can read any table the database user can see, which on a WordPress install means user records, password hashes and session or API secrets stored in options. For SupportCandy the fix is 3.5.4: builds <= 3.5.3 are affected, anything from 3.5.4 onward is not.

Remediation

Update to version 3.5.4, or a newer patched version

How does WordSec protect against this?

An attacker needs Custom access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: SupportCandy 3.5.4 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-94539https://www.wordfence.com/threat-intel/vulnerabilities/id/9c105a36-452e-4fa7-9c8b-f142e1eb27aahttps://nvd.nist.gov/vuln/detail/CVE-2026-94539

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C