CVE-2026-16960: Loops & Logic WordPress Information Disclosure

CVE-2026-16960 Overview

CVE-2026-16960 is an information disclosure vulnerability in the Loops & Logic WordPress plugin versions prior to 4.3.0. The plugin exposes a public template-data action that fails to restrict responses to data the requesting visitor is authorized to view. Unauthenticated attackers can query the endpoint to read arbitrary user records, including email addresses and assigned roles, along with arbitrary site options. The flaw maps to CWE-200: Exposure of Sensitive Information to an Unauthorized Actor. Site operators running affected versions face account enumeration risks that support downstream phishing, credential stuffing, and targeted privilege escalation attempts.

Critical Impact
Unauthenticated remote attackers can harvest WordPress user email addresses, roles, and arbitrary site options from any site running Loops & Logic before 4.3.0.

Affected Products

Loops & Logic WordPress plugin versions before 4.3.0
WordPress sites with the plugin installed and activated
Any hosting environment exposing the vulnerable plugin endpoint to the public internet

Discovery Timeline

2026-09-09 - CVE-2026-16960 published to the National Vulnerability Database
2026-09-09 - Last updated in NVD database

Technical Details for CVE-2026-16960

Vulnerability Analysis

The Loops & Logic plugin registers a public template-data action intended to render dynamic content on the front end. The handler processes requests without validating whether the visitor is permitted to view the requested data types. Because the endpoint accepts unauthenticated requests, attackers can invoke it directly through standard WordPress AJAX or REST paths.

The response returns raw records for WordPress data objects that the plugin exposes as templatable sources. This includes user objects with sensitive fields such as user_email and roles, plus entries from the wp_options table. Site options often contain internal URLs, API keys stored by other plugins, and configuration flags that reveal the site's security posture.

Exploitation requires no authentication, no user interaction, and only network access to the target site. Attackers can automate enumeration across many sites by fingerprinting the plugin and issuing a small number of HTTP requests per host.

Root Cause

The root cause is a missing authorization check on the template-data action handler. The plugin trusts that its template layer will only request permitted data, but the handler itself does not enforce a capability check with current_user_can() or filter output based on the requester's role. This is a classic broken access control pattern in which server-side authorization is delegated to a client that an attacker fully controls.

Attack Vector

An unauthenticated attacker sends crafted HTTP requests to the plugin's public template-data endpoint. By supplying parameters that reference user records or option names, the attacker receives structured responses containing the requested data. Refer to the WPScan Vulnerability Report for the specific action name and parameter structure. No exploitation code is required beyond an HTTP client capable of issuing POST or GET requests.

Detection Methods for CVE-2026-16960

Indicators of Compromise

Repeated unauthenticated POST or GET requests to WordPress AJAX (admin-ajax.php) or REST endpoints associated with the Loops & Logic plugin
HTTP responses from the plugin endpoint containing serialized user objects, user_email values, or wp_options keys
Bursts of requests from a single IP or ASN iterating through user IDs or option name patterns
Follow-on credential stuffing or spear-phishing activity targeting user accounts recently enumerated from the site

Detection Strategies

Inventory WordPress deployments and flag any host running Loops & Logic below version 4.3.0
Parse web server access logs for requests referencing the plugin's template-data action parameter
Alert when response payloads from the plugin endpoint exceed a size threshold typical of legitimate template rendering
Correlate outbound phishing complaints against accounts whose email addresses were exposed by the plugin

Monitoring Recommendations

Enable verbose logging on admin-ajax.php and REST API routes exposed by the plugin
Forward WordPress and web server logs to a centralized platform for retention and correlation
Baseline normal request rates to plugin endpoints and alert on statistical anomalies
Monitor for new user registrations and password reset requests immediately after suspected enumeration activity

How to Mitigate CVE-2026-16960

Immediate Actions Required

Upgrade the Loops & Logic plugin to version 4.3.0 or later on every affected site
Rotate any API keys or secrets that may have been stored in wp_options and could have been exposed
Force password resets for administrator and editor accounts if logs show evidence of enumeration
Review web server logs from before the patch was applied for signs of unauthenticated calls to the plugin endpoint

Patch Information

The vendor addressed the issue in Loops & Logic 4.3.0 by restricting the public template-data action so it only returns data the requesting visitor is authorized to see. Confirm the installed version through the WordPress admin plugins screen or via WP-CLI. Additional details are available in the WPScan Vulnerability Report.

Workarounds

If immediate patching is not possible, deactivate the Loops & Logic plugin until the update can be applied
Block or rate-limit unauthenticated requests to the plugin's template-data endpoint at the web application firewall
Restrict access to admin-ajax.php actions associated with the plugin using server-side rules where feasible

bash

# Configuration example
# Update Loops & Logic using WP-CLI
wp plugin update tangible-loops-and-logic --version=4.3.0

# Or deactivate as a temporary workaround
wp plugin deactivate tangible-loops-and-logic