CVE-2026-57811 Overview
CVE-2026-57811 is a code injection vulnerability in the Realtyna Organic IDX plugin for WordPress (real-estate-listing-realtyna-wpl). The flaw affects all versions up to and including 5.2.0. Attackers can trigger Remote Code Inclusion without authentication or user interaction, leading to full remote code execution on affected WordPress sites. The vulnerability is classified under CWE-94 (Improper Control of Generation of Code). Real estate websites running the affected plugin are exposed to complete compromise of the underlying web server.
Critical Impact
Unauthenticated remote attackers can inject and execute arbitrary code on WordPress sites running Realtyna Organic IDX plugin version 5.2.0 or earlier, resulting in full site takeover.
Affected Products
- Realtyna Organic IDX plugin (real-estate-listing-realtyna-wpl) versions up to and including 5.2.0
- WordPress sites with the plugin installed and activated
- Real estate listing websites relying on the Realtyna IDX integration
Discovery Timeline
- 2026-07-13 - CVE CVE-2026-57811 published to NVD
- 2026-07-13 - Last updated in NVD database
Technical Details for CVE-2026-57811
Vulnerability Analysis
The vulnerability stems from improper control of code generation within the Realtyna Organic IDX plugin. The plugin processes attacker-controlled input in a code execution context without adequate validation or sanitization. This enables Remote Code Inclusion, where an attacker forces the application to include and execute code from an attacker-controlled source. The scope change indicated in the vulnerability metrics reflects that a successful exploit can affect resources beyond the vulnerable component itself. Because the affected plugin is deployed on public-facing WordPress installations, exploitation requires no authentication or user interaction. Successful exploitation grants attackers the ability to execute arbitrary PHP code with the privileges of the web server process.
Root Cause
The root cause is improper handling of user-supplied input in a code generation or file inclusion routine. The plugin fails to validate, sanitize, or restrict input that is later evaluated as code or used to construct include paths. This matches the [CWE-94] pattern of dynamically constructing executable code from untrusted input. See the Patchstack Remote Code Execution Advisory for technical details.
Attack Vector
An unauthenticated attacker sends a crafted HTTP request to a vulnerable endpoint exposed by the plugin. The request contains input designed to be interpreted as code or as a path to remote/local content that is subsequently included. The plugin processes the request and executes the injected code within the WordPress PHP runtime. No user interaction is required, and the attack can be automated at scale against WordPress deployments.
// No verified proof-of-concept code is publicly available.
// Refer to the Patchstack advisory linked above for technical details.
Detection Methods for CVE-2026-57811
Indicators of Compromise
- Unexpected PHP files or webshells written to the WordPress wp-content/plugins/real-estate-listing-realtyna-wpl/ directory or elsewhere in the webroot
- Outbound HTTP requests originating from the web server to unfamiliar remote hosts, indicating remote file inclusion
- Suspicious entries in WordPress access logs referencing plugin endpoints with unusual query parameters or payloads containing PHP wrappers such as php:// or data://
Detection Strategies
- Monitor web server logs for HTTP requests targeting Realtyna Organic IDX plugin endpoints with unusual parameters, URL-encoded PHP syntax, or references to remote URLs
- Deploy Web Application Firewall (WAF) rules to identify code injection patterns such as eval(, system(, include( with remote URLs, and PHP stream wrappers
- Perform file integrity monitoring on the WordPress installation to detect new or modified PHP files in plugin directories
Monitoring Recommendations
- Alert on new PHP process executions spawned by the web server user, particularly sh, bash, curl, wget, or python invocations
- Track outbound network connections from the web server to non-approved destinations
- Enable and centralize WordPress and PHP error logs to capture inclusion failures and evaluation errors that may indicate exploitation attempts
How to Mitigate CVE-2026-57811
Immediate Actions Required
- Identify all WordPress installations running the Realtyna Organic IDX plugin and confirm the installed version
- Deactivate and remove the plugin on affected sites until a patched version is available and verified
- Review the WordPress installation for signs of compromise, including unauthorized administrator accounts, unexpected plugin or theme files, and modified wp-config.php
Patch Information
At the time of publication, the affected version range is documented as "n/a through <= 5.2.0." Review the Patchstack Remote Code Execution Advisory for the latest fixed version information and vendor guidance. Apply the vendor-supplied update as soon as it becomes available.
Workarounds
- Deactivate the Realtyna Organic IDX plugin until a fix is applied
- Restrict access to WordPress plugin endpoints using a WAF or reverse proxy rules that block requests containing PHP stream wrappers, remote URLs in parameters, or known exploit signatures
- Disable PHP directives that permit remote file inclusion, specifically ensure allow_url_include=Off and allow_url_fopen=Off where feasible in php.ini
# Configuration example: harden PHP against remote code inclusion
# In php.ini
allow_url_include = Off
allow_url_fopen = Off
disable_functions = exec,passthru,shell_exec,system,proc_open,popen
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
