CVE-2026-14592 Overview
CVE-2026-14592 is a stored cross-site scripting (XSS) vulnerability [CWE-79] in the WP Real IP-based Access Control WordPress plugin through version 1.3.1. The plugin fails to perform capability or nonce checks before saving one of its option values. It also fails to escape the value when rendering the settings page. Unauthenticated attackers can store arbitrary JavaScript that executes in the browser of any administrator who loads the settings page. Successful exploitation can lead to administrator session compromise, account takeover, and full site compromise.
Critical Impact
Unauthenticated attackers can inject persistent JavaScript that executes with administrator context on the plugin settings page.
Affected Products
- WP Real IP-based Access Control WordPress plugin, all versions through 1.3.1
Discovery Timeline
- 2026-07-30 - CVE-2026-14592 published to NVD
- 2026-07-30 - Last updated in NVD database
Technical Details for CVE-2026-14592
Vulnerability Analysis
The plugin exposes an option-update handler that writes user-supplied input to a WordPress option without validating the request. Two independent security controls are missing. First, the handler does not verify user capabilities, so any unauthenticated visitor can trigger the update. Second, the handler does not verify a WordPress nonce, so requests are not tied to an authenticated administrator session.
When an administrator later opens the plugin settings page, the stored value is rendered into the HTML output without escaping. The browser parses attacker-controlled content as executable JavaScript. The payload runs in the administrator's authenticated session and can create new administrator accounts, modify plugin or theme files, or exfiltrate session cookies.
Root Cause
The root cause is missing authorization and missing output encoding. The option handler lacks current_user_can() and check_admin_referer() (or wp_verify_nonce()) calls before persisting data. The settings template renders the option value without passing it through esc_attr(), esc_html(), or a comparable escaping function. This combination turns a low-privilege configuration field into a persistent script injection sink.
Attack Vector
An unauthenticated attacker sends a crafted HTTP request to the plugin's option-storage endpoint containing a JavaScript payload in the vulnerable field. The plugin stores the payload in the WordPress options table. The next administrator who views the settings page triggers execution of the payload in their browser. No user interaction beyond viewing the settings page is required by the administrator. See the WPScan Vulnerability Report for technical details.
Detection Methods for CVE-2026-14592
Indicators of Compromise
- Unexpected <script> tags, on* event handlers, or javascript: URIs stored in the plugin's option rows within the wp_options table.
- New administrator accounts created shortly after an administrator visited the plugin settings page.
- Unauthenticated POST requests to admin-ajax.php or admin-post.php referencing plugin option actions from unfamiliar IP addresses.
Detection Strategies
- Query the wp_options table for values belonging to WP Real IP-based Access Control and inspect them for HTML or JavaScript syntax.
- Review web server access logs for unauthenticated write requests to plugin endpoints, especially POSTs from single-request source IPs.
- Correlate administrator browser errors, unexpected redirects, or content security policy violations with visits to /wp-admin/ pages associated with the plugin.
Monitoring Recommendations
- Alert on modifications to WordPress options that contain characters such as <, >, or = where non-HTML values are expected.
- Monitor creation of administrator-role users and changes to user_roles outside of approved change windows.
- Track integrity of core WordPress files and installed plugins to identify follow-on tampering after XSS execution.
How to Mitigate CVE-2026-14592
Immediate Actions Required
- Deactivate and remove the WP Real IP-based Access Control plugin until a patched release is available.
- Audit the wp_options table for stored payloads and remove any option values containing script content.
- Force a password reset and session invalidation for all administrator accounts on affected sites.
- Review recently created users and scheduled tasks (wp_cron) for unauthorized additions.
Patch Information
At the time of publication, no fixed version is listed. Versions through 1.3.1 are affected. Monitor the WPScan Vulnerability Report for updates from the plugin maintainer.
Workarounds
- Block unauthenticated POST requests to the plugin's option-handling endpoints at the web application firewall.
- Restrict /wp-admin/ access by source IP or through an authenticating reverse proxy to limit administrator exposure to stored payloads.
- Apply a strict Content Security Policy that disallows inline scripts on WordPress admin pages to reduce XSS execution impact.
# Example: temporarily disable the plugin via WP-CLI
wp plugin deactivate wp-real-ip-based-access-control
wp plugin delete wp-real-ip-based-access-control
# Inspect suspicious option values for stored script content
wp option list --search='*real_ip*' --format=table
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
