External risk intelligence

SQL Injection in Ajax Search Lite

CVE advisorySeverity: CRITICAL (CVSS 9.3)

CVE-2026-111852

The vulnerability affects a WordPress plugin designed to provide site-wide search functionality. Such plugins are typically embedded directly into the public-facing front end of a website to allow visitors to search content, making the search interface and its underlying endpoints commonly exposed to the internet by design.

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 vulnerability involves a weakness in how a popular WordPress search tool processes commands, potentially allowing attackers to manipulate database queries. The concern is that this could expose sensitive information or disrupt operations, depending on how the affected system is configured and used.

Weakness in a WordPress search tool.
Exposes sensitive data or disrupts operations.
Confirm relevance and exposure; assess business risk.

Attack Path

How an attacker could exploit the issue

An attacker can exploit this vulnerability by sending specially crafted requests to the affected search feature. This could allow them to interfere with database queries, potentially leading to unauthorized access to sensitive information.

No authentication or user interaction needed.
Via specially crafted search requests.
Allows blind SQL injection to access data.

Live Threat

Current exploitation, exposure, and threat context

This SQL injection vulnerability could allow an unauthenticated attacker to execute arbitrary SQL commands on the application's database when supported by the advisory. This could potentially lead to unauthorized access to or manipulation of sensitive data stored within the database.

Database data and integrity.
Through specially crafted search queries.
Unauthorized access to information.

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability in Ajax Search Lite likely impacts WordPress site owners and their web development or operations teams. The first step is to identify all instances of the plugin, confirm their exposure to the internet, and assess business criticality. Following this, responsible teams should coordinate remediation based on the identified risk.

Application owners are responsible.
Verify plugin and internet exposure.
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 Ajax Search Lite?

Ajax Search Lite is a WordPress plugin designed to add a live, responsive search bar to websites. It is commonly used by site administrators to improve visitor experience by providing real-time search results for posts, pages, and custom post types directly on the front end of a site.

What does SQL injection mean for CVE-2026-111852?

This vulnerability is classified as CWE-89, or SQL Injection. It occurs when a program fails to properly filter input before using it in a database query. In this case, an attacker can insert malicious commands into search fields, tricking the database into revealing information it should keep hidden.

How do attackers trigger this vulnerability?

An attacker triggers this by sending specifically formatted requests to the search function. Because the search feature is designed to process user input, it does not require the attacker to have an account or log in. Simply browsing the site and using the search bar with crafted input is sufficient to initiate the attack.

Is my website at risk from this CVE?

According to Halo Surface Signal, this plugin is intentionally placed on public-facing pages to be used by site visitors. Since the search interface is exposed to the internet by design to function, any site running vulnerable versions of Ajax Search Lite is accessible to remote attackers.

What should I do if I use this plugin?

Start by auditing your WordPress environment to find where this plugin is active. Once you have a list of affected sites, prioritize them based on the sensitivity of the data stored in your database. Ensure you are monitoring for updates from the vendor to resolve the flaw and protect your site's information.

References

patchstack.com/database/wordpress/plugin/ajax-search-lite/vulnerabil…

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.