External risk intelligence

Participants Database WordPress Plugin SQL Injection Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.1)

CVE-2026-13596

The vulnerability affects a WordPress plugin, which is typically deployed as a public-facing web application. Since the plugin processes user-supplied input on these web pages, it is commonly reachable from the internet.

SQL Injection

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

This critical vulnerability in a WordPress plugin allows unauthorized external attackers to potentially access or alter sensitive information through SQL injection. The concern is significant because it affects widely used website technology and could lead to data compromise if our systems utilize this specific plugin.

Unauthenticated users can inject malicious code.
Affects website data if the plugin is used.
Confirm relevance; assess exposure and potential impact.

Attack Path

How an attacker could exploit the issue

An unauthenticated attacker can exploit this vulnerability by sending specially crafted input to a vulnerable WordPress site that uses the affected plugin. This input is not properly checked, allowing the attacker to manipulate a database query. Successful exploitation could allow an attacker to access or modify sensitive data.

Accessible via the network.
SQL query with unsanitized input.
Unauthenticated SQL injection.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow unauthenticated attackers to inject malicious SQL code into the Participants Database WordPress plugin. When supported by the advisory, this could lead to unauthorized access or modification of the database content.

Affects participant database records.
Unauthenticated SQL injection is possible.
Unauthorized data access or modification.

Operational Fix

Recommended remediation, mitigation, and detection steps

Application owners and platform teams managing WordPress deployments are responsible for addressing this SQL injection vulnerability. The first practical step is to identify all instances of the affected plugin, determine their internet reachability and business criticality, and then prioritize remediation efforts based on risk, coordinating with vendor management if necessary.

Application owners should own this issue.
Verify all WordPress plugin instances.
Plan remediation based on risk.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is the Participants Database WordPress plugin?

This software is a WordPress plugin designed to help site administrators collect, manage, and display information about people, such as members or event registrants. It functions by creating a specialized database structure within the WordPress environment, allowing users to input and retrieve personal records through web forms and display pages.

What does CVE-2026-13596 mean by SQL injection?

This vulnerability is classified as Improper Neutralization of Special Elements used in an SQL Command (CWE-89). It occurs when the plugin fails to clean user input before including it in database queries. Because the application blindly trusts this input, an attacker can substitute their own database commands, effectively tricking the system into executing unauthorized operations on the stored data.

How does an attacker trigger this vulnerability?

An attacker exploits this by sending specifically crafted parameters to the plugin's input fields, which are then processed by the vulnerable SQL query. It is important to note that this process does not require administrative login or prior authentication. Simply interacting with the plugin's front-end input forms via the network is sufficient for the code to execute the malicious commands.

Is my website at risk from this vulnerability?

If you are running a version of the Participants Database plugin older than 2.7.8.4, your site may be vulnerable. Halo Surface Signal identifies this as a high-priority concern because the plugin is typically used on public-facing websites, making it easily reachable from the internet. You should verify if your site currently has the affected software active.

Do I need to take action if I use this plugin?

Yes, start by identifying every WordPress instance in your environment that utilizes this plugin. Once you have an inventory, assess which sites are reachable from the internet and prioritize them for updates. Work with your technical team to apply the vendor-provided patch immediately to remove the flaw and prevent potential unauthorized database access.

References

wpscan.com/vulnerability/e22227c8-506e-4188-a7a1-1952b41c47f5/

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.