CVE-2026-57707: Simple Business Directory Pro SQLi Flaw

CVE-2026-57707 Overview

CVE-2026-57707 is a SQL Injection vulnerability in the quantumcloud Simple Business Directory Pro plugin for WordPress. The flaw affects all versions up to and including 15.9.4. Attackers can inject malicious SQL statements through unsanitized input parameters processed by the plugin. Exploitation requires no authentication and no user interaction, and it can be performed over the network. Successful attacks expose database contents and can extend impact beyond the vulnerable plugin scope. The vulnerability is tracked under CWE-89 and was published to the National Vulnerability Database on July 13, 2026.

Critical Impact
Unauthenticated remote attackers can extract sensitive database contents from any WordPress site running Simple Business Directory Pro <= 15.9.4.

Affected Products

quantumcloud Simple Business Directory Pro plugin for WordPress
All versions from initial release through 15.9.4
WordPress installations with the simple-business-directory-pro plugin active

Discovery Timeline

2026-07-13 - CVE-2026-57707 published to NVD
2026-07-13 - Last updated in NVD database

Technical Details for CVE-2026-57707

Vulnerability Analysis

CVE-2026-57707 stems from improper neutralization of special elements used in a SQL command within the Simple Business Directory Pro plugin. The plugin concatenates user-controlled input into SQL queries without parameterized statements or adequate escaping. An unauthenticated attacker sends crafted HTTP requests containing SQL metacharacters to a vulnerable endpoint. The database engine then executes the attacker-supplied fragments as part of legitimate queries.

The scope is marked as changed, indicating that a successful attack can affect resources beyond the plugin's own security boundary. Confidentiality impact is high, meaning attackers can read arbitrary tables including wp_users and stored session data. Integrity impact is rated none while availability impact is low, consistent with a read-oriented injection that can also disrupt database performance.

Root Cause

The root cause is direct interpolation of request parameters into SQL statements handled by the plugin. The code path does not use WordPress $wpdb->prepare() placeholders or equivalent input sanitization routines. Any request parameter reaching the vulnerable query becomes a vector for injection.

Attack Vector

Attackers deliver payloads through standard HTTP or HTTPS requests to WordPress endpoints exposed by the plugin. Because no authentication is required, internet-facing sites are directly reachable. Automated scanners can weaponize the flaw against large numbers of WordPress deployments. The EPSS score is 0.291% at the 21st percentile as of July 20, 2026, but this can rise quickly once public proof-of-concept code appears.

See the Patchstack advisory for additional technical context.

Detection Methods for CVE-2026-57707

Indicators of Compromise

HTTP requests containing SQL keywords such as UNION SELECT, SLEEP(, INFORMATION_SCHEMA, or -- targeting simple-business-directory-pro endpoints
Unusual wp_users or wp_options table read patterns in MySQL slow query or general logs
Outbound traffic from the WordPress host to unfamiliar destinations following directory plugin requests
New or modified administrator accounts created outside change windows

Detection Strategies

Deploy Web Application Firewall (WAF) rules that block SQL injection payloads targeting WordPress plugin routes
Monitor WordPress wp-content/plugins/simple-business-directory-pro/ access logs for anomalous query strings and encoded metacharacters
Enable MySQL query logging and alert on queries containing tautologies such as OR 1=1 or time-based functions from the WordPress database user

Monitoring Recommendations

Correlate web server access logs with database query logs to identify injection attempts reaching the backend
Track plugin inventory across all managed WordPress sites and flag installations with version <= 15.9.4
Alert on file changes within the WordPress installation directory that follow suspicious database read activity

How to Mitigate CVE-2026-57707

Immediate Actions Required

Identify every WordPress site running the simple-business-directory-pro plugin and confirm the installed version
Update the plugin to a fixed release once quantumcloud publishes a patched version beyond 15.9.4
Rotate WordPress administrator credentials and database passwords if injection attempts are observed in logs
Review the wp_users table for unauthorized accounts and remove any not tied to legitimate operators

Patch Information

At the time of publication, no fixed version is documented in the NVD entry for CVE-2026-57707. Consult the Patchstack advisory for the latest remediation status and monitor the plugin repository for a security release.

Workarounds

Deactivate and remove the Simple Business Directory Pro plugin until a patched version is available
Restrict access to WordPress admin and plugin endpoints using IP allowlists at the reverse proxy or WAF
Apply virtual patching through WAF signatures that block SQL injection patterns against the plugin's request parameters
Enforce least-privilege on the WordPress database user to limit the impact of successful injection

bash

# Configuration example: temporarily disable the vulnerable plugin via WP-CLI
wp plugin deactivate simple-business-directory-pro
wp plugin delete simple-business-directory-pro