psmplugins SupportCandy Plugin up to 3.5.3 on WordPress sort_by sql injection

Summaryinfo

A vulnerability identified as critical has been detected in psmplugins SupportCandy Plugin up to 3.5.3. This affects an unknown part. The manipulation of the argument sort_by leads to sql injection. This vulnerability is documented as CVE-2026-94539. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in psmplugins SupportCandy Plugin up to 3.5.3. It has been rated as critical. This issue affects some unknown functionality. The manipulation of the argument sort_by with an unknown input leads to a sql injection vulnerability. Using CWE to declare the problem leads to CWE-89. The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at wordfence.com. The identification of this vulnerability is CVE-2026-94539 since 09/21/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/03/2026). MITRE ATT&CK project uses the attack technique T1505 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-91879). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• WordPress Plugin

Vendor

• psmplugins

Name

• SupportCandy Plugin

Version

• 3.5.0
• 3.5.1
• 3.5.2
• 3.5.3

CPE 2.3info

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CPE 2.2info

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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