CVE-2026-45439: Realtyna Organic IDX SQLi Vulnerability

CVE-2026-45439 Overview

CVE-2026-45439 is an unauthenticated SQL Injection vulnerability affecting the Realtyna Organic IDX plugin for WordPress in versions up to and including 5.1.0. The flaw is classified under CWE-89 (Improper Neutralization of Special Elements used in an SQL Command) and stems from unsanitized user input being passed into SQL queries. Remote attackers can interact with the database without authentication, requesting confidential records and impacting backend availability. The vulnerability was published to the National Vulnerability Database (NVD) by Patchstack.

Critical Impact
Unauthenticated attackers can issue arbitrary SQL queries against the WordPress database hosting the Realtyna Organic IDX plugin, exposing sensitive data and impacting database availability.

Affected Products

Realtyna Organic IDX plugin (real-estate-listing-realtyna-wpl) for WordPress
All versions up to and including 5.1.0
WordPress sites running this plugin without compensating web application firewall controls

Discovery Timeline

2026-06-15 - CVE-2026-45439 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2026-45439

Vulnerability Analysis

The vulnerability resides in the Realtyna Organic IDX WordPress plugin, which provides MLS-style real estate listings on WordPress sites. The plugin accepts user-controlled input from HTTP request parameters and concatenates that input into SQL statements without applying proper parameterization or sanitization. Because no authentication is required to reach the vulnerable code path, any remote, anonymous user can trigger the flaw. The Patchstack advisory categorizes the issue as an unauthenticated SQL Injection affecting plugin versions up to 5.1.0. The EPSS score reported on 2026-06-18 stands at 0.291%, reflecting current observed exploitation likelihood rather than technical exploitability.

Root Cause

The root cause is improper neutralization of special characters in user-supplied parameters before those parameters are used inside SQL queries. The plugin does not use $wpdb->prepare() with placeholders for the affected query, nor does it apply allowlist validation on input. Attacker-controlled values flow directly into the SQL string, allowing query syntax manipulation.

Attack Vector

The attack vector is network-based. An attacker sends a crafted HTTP request to a vulnerable endpoint exposed by the plugin, embedding SQL syntax inside a parameter that the plugin trusts. The injected payload alters the structure of the executed query, enabling techniques such as UNION-based data extraction, boolean-based blind extraction, or time-based blind extraction depending on the response surface. No user interaction or prior authentication is needed. The scope is changed because the WordPress database commonly stores credentials and personal data for additional security boundaries beyond the plugin itself.

No verified proof-of-concept code has been published. Refer to the Patchstack SQL Injection Vulnerability advisory for additional technical context.

Detection Methods for CVE-2026-45439

Indicators of Compromise

HTTP requests to Realtyna IDX (wpl) endpoints containing SQL metacharacters such as ', --, UNION SELECT, SLEEP(, or BENCHMARK(.
Unusually long query strings or POST bodies targeting plugin parameters used in listing search and filter functions.
Database error messages surfacing in HTTP responses or web server error logs referencing the wp_wpl_* tables.
Outbound DNS or HTTP callbacks originating from the web server immediately after requests to plugin endpoints, suggesting out-of-band data exfiltration.

Detection Strategies

Inspect access logs for repeated requests to plugin URLs with encoded SQL syntax such as %27, %20OR%20, or %20UNION%20.
Enable WordPress debug logging and monitor wp-content/debug.log for SQL syntax errors associated with the wpl plugin.
Deploy web application firewall (WAF) rules tuned for SQL Injection signatures on parameters delivered to plugin endpoints.
Correlate spikes in database CPU usage or slow query log entries with HTTP traffic to the affected plugin paths.

Monitoring Recommendations

Forward web server, PHP error, and MySQL query logs to a centralized SIEM for cross-source correlation.
Establish baseline query patterns for the wp_wpl_* tables and alert on deviations such as INFORMATION_SCHEMA reads.
Monitor for new WordPress administrator accounts, modified wp_users rows, or unexpected wp_options changes following suspicious traffic.

How to Mitigate CVE-2026-45439

Immediate Actions Required

Upgrade the Realtyna Organic IDX plugin to a version newer than 5.1.0 as soon as the vendor publishes a fixed release.
Place the WordPress site behind a WAF with SQL Injection signatures enabled, and apply virtual patching rules referencing the Patchstack advisory.
Rotate WordPress database credentials, administrator passwords, and API keys if exploitation is suspected.
Audit the database for unauthorized rows in wp_users, wp_usermeta, and plugin-specific tables.

Patch Information

Review the Patchstack SQL Injection Vulnerability advisory for the latest fixed version guidance. Until a vendor patch is confirmed installed, treat all instances running version 5.1.0 or earlier as vulnerable. Patchstack subscribers can apply vPatch protection to block exploitation attempts at the application layer.

Workarounds

Disable the Realtyna Organic IDX plugin until a patched release is installed if the IDX functionality is not business-critical.
Restrict access to plugin endpoints by IP allowlist at the web server or reverse proxy layer where feasible.
Apply least-privilege principles to the MySQL account used by WordPress, removing FILE, CREATE USER, and cross-database privileges.
Enforce input validation and SQL query filtering at the WAF layer using OWASP CRS rules tuned for WordPress traffic.

bash

# Example ModSecurity rule snippet to block SQLi attempts on plugin endpoints
SecRule REQUEST_URI "@contains /wp-admin/admin-ajax.php" \
    "chain,phase:2,deny,status:403,id:1004539,\
     msg:'Possible SQLi against Realtyna IDX (CVE-2026-45439)'"
    SecRule ARGS "@detectSQLi" \
        "t:none,t:urlDecodeUni,t:lowercase"