CVE-2026-27347: Crocoblock JetPopup Auth Bypass Flaw

CVE-2026-27347 Overview

CVE-2026-27347 is a missing authorization vulnerability in the Crocoblock JetPopup plugin for WordPress. The flaw affects all versions up to and including 2.0.20.2. Attackers can exploit incorrectly configured access control security levels to reach functionality that should require authentication or elevated privileges. The vulnerability is categorized under [CWE-862] Missing Authorization and is exploitable over the network without user interaction or prior authentication. Impact is limited to unauthorized read access to information exposed by affected endpoints.

Critical Impact
Unauthenticated network-based access to protected JetPopup functionality, resulting in low-level confidentiality disclosure on sites running vulnerable versions of the plugin.

Affected Products

Crocoblock JetPopup WordPress plugin
All versions from initial release through 2.0.20.2
WordPress sites with the vulnerable plugin installed and active

Discovery Timeline

2026-09-04 - CVE-2026-27347 published to NVD
2026-09-04 - Last updated in NVD database

Technical Details for CVE-2026-27347

Vulnerability Analysis

The vulnerability stems from missing authorization checks within the JetPopup plugin. Affected endpoints do not verify whether the requesting user holds the necessary privileges before executing plugin functionality. An unauthenticated attacker can issue crafted HTTP requests directly to the exposed handlers and receive responses that would otherwise be restricted.

The issue falls under [CWE-862] Missing Authorization. This weakness class occurs when application code performs sensitive actions or returns sensitive data without validating the caller's role or capability. In WordPress plugins, this typically appears when AJAX actions, REST routes, or admin-post handlers omit calls to current_user_can() or capability-mapped nonce verification.

Exploitation does not require user interaction. The attack complexity is low, and the impact is confined to confidentiality of data exposed through the vulnerable handlers. Integrity and availability are not affected. See the Patchstack WordPress Vulnerability Report for advisory details.

Root Cause

The root cause is an incorrectly configured access control security level on one or more plugin endpoints. Authorization enforcement is either absent or implemented at a permission tier that permits unauthenticated or low-privileged callers to invoke restricted behavior.

Attack Vector

An attacker sends HTTP requests to the vulnerable JetPopup endpoints on a WordPress site running a version at or below 2.0.20.2. Because the endpoints do not enforce proper capability checks, the server processes the request and returns data that should be gated behind authorization. No credentials, session, or user interaction are required.

No verified public exploit code is available at the time of publication. Refer to the vendor advisory listed in the references for further technical detail.

Detection Methods for CVE-2026-27347

Indicators of Compromise

Unauthenticated HTTP requests to admin-ajax.php or REST routes containing jet-popup or jet_popup action parameters.
Anomalous request volume from single source IPs targeting JetPopup endpoints without a valid WordPress session cookie.
Web server logs showing successful (HTTP 200) responses to JetPopup handlers from unauthenticated clients.

Detection Strategies

Inventory WordPress installations to identify sites running JetPopup at version 2.0.20.2 or earlier.
Correlate access logs against the list of plugin AJAX actions and REST routes to surface unauthorized invocations.
Deploy Web Application Firewall (WAF) rules that flag JetPopup endpoint access lacking authenticated session context.

Monitoring Recommendations

Enable verbose logging on wp-admin/admin-ajax.php and the WordPress REST API to capture endpoint access patterns.
Alert on repeated access to plugin endpoints from external IPs outside expected administrative ranges.
Track plugin version drift across managed WordPress fleets to detect unpatched instances.

How to Mitigate CVE-2026-27347

Immediate Actions Required

Identify all WordPress sites running Crocoblock JetPopup at version 2.0.20.2 or earlier.
Update JetPopup to a fixed release once made available by Crocoblock, per the Patchstack advisory.
If no patched version is currently available, deactivate the plugin until a fix is released.

Patch Information

At the time of publication, the advisory lists affected versions from n/a through 2.0.20.2. Administrators should monitor the Patchstack WordPress Vulnerability Report and the Crocoblock plugin page for a fixed release, then upgrade all instances promptly.

Workarounds

Deactivate and remove the JetPopup plugin from WordPress sites where popup functionality is not business-critical.
Restrict access to wp-admin/admin-ajax.php and REST routes handling JetPopup actions using WAF rules or IP allowlisting.
Enforce authentication at the reverse proxy layer for administrative endpoints where feasible.

bash

# Configuration example: restrict JetPopup AJAX actions at the WAF/nginx layer
location = /wp-admin/admin-ajax.php {
    if ($arg_action ~* "jet[_-]popup") {
        # Allow only requests from trusted admin IP ranges
        allow 203.0.113.0/24;
        deny all;
    }
    include fastcgi_params;
    fastcgi_pass php-fpm;
}