CVE-2025-39479: Smart Notification SQL Injection Flaw

CVE-2025-39479 Overview

CVE-2025-39479 is a critical SQL Injection vulnerability affecting the Smart Notification WordPress plugin developed by smartiolabs. This improper neutralization of special elements used in SQL commands allows attackers to perform Blind SQL Injection attacks against vulnerable WordPress installations. The vulnerability exists in all versions of the plugin from the initial release through version 10.3.

Critical Impact
This vulnerability enables unauthenticated attackers to extract sensitive database information through Blind SQL Injection techniques, potentially compromising user credentials, personally identifiable information, and complete database contents without requiring any authentication.

Affected Products

Smart Notification WordPress Plugin versions through 10.3
WordPress installations with the smio-push-notification plugin installed
All WordPress sites running vulnerable versions of the Smart Notification plugin

Discovery Timeline

2025-06-17 - CVE-2025-39479 published to NVD
2025-06-17 - Last updated in NVD database

Technical Details for CVE-2025-39479

Vulnerability Analysis

This vulnerability falls under CWE-89 (Improper Neutralization of Special Elements used in an SQL Command), commonly known as SQL Injection. The Smart Notification plugin fails to properly sanitize user-supplied input before incorporating it into SQL queries, allowing attackers to inject malicious SQL commands that are executed by the database server.

The Blind SQL Injection variant indicates that while the application does not directly return database output to the attacker, it exhibits different behaviors based on whether injected conditions evaluate to true or false. This allows attackers to methodically extract data one character at a time through inference-based techniques.

The vulnerability is network-accessible and requires no authentication or user interaction to exploit, making it particularly dangerous for internet-facing WordPress installations.

Root Cause

The root cause of CVE-2025-39479 lies in the Smart Notification plugin's failure to implement proper input validation and parameterized queries. User-controllable input is directly concatenated into SQL statements without adequate sanitization or the use of prepared statements with bound parameters. This allows special SQL characters and commands to be interpreted as part of the query logic rather than as literal data values.

Attack Vector

The attack vector for this vulnerability is network-based, allowing remote attackers to exploit it without requiring local access to the system. An attacker can craft malicious HTTP requests containing SQL injection payloads targeting vulnerable endpoints within the Smart Notification plugin.

The exploitation process typically involves:

Identifying injectable parameters within the plugin's request handlers
Sending crafted requests with boolean-based or time-based blind SQL injection payloads
Observing application responses or timing differences to infer database contents
Systematically extracting sensitive information including WordPress user credentials, email addresses, and other database contents

Detailed technical information about this vulnerability is available in the Patchstack Security Advisory.

Detection Methods for CVE-2025-39479

Indicators of Compromise

Unusual SQL error messages in WordPress debug logs referencing the Smart Notification plugin
Web server access logs showing requests with SQL syntax characters such as single quotes, double dashes, or UNION SELECT statements targeting plugin endpoints
Database query logs containing unexpected SLEEP(), BENCHMARK(), or conditional timing functions
Anomalous increases in database query execution times

Detection Strategies

Deploy Web Application Firewall (WAF) rules specifically targeting SQL injection patterns in requests to /wp-content/plugins/smio-push-notification/ endpoints
Implement database activity monitoring to detect unusual query patterns or time-based SQL injection attempts
Enable WordPress debug logging and monitor for SQL syntax errors originating from the Smart Notification plugin
Configure intrusion detection systems to alert on common Blind SQL Injection payloads

Monitoring Recommendations

Review web server access logs regularly for requests containing encoded SQL injection payloads
Monitor database server performance metrics for unusual spikes in query execution times
Implement real-time alerting for failed SQL queries originating from plugin components
Track WordPress plugin file integrity to detect any unauthorized modifications

How to Mitigate CVE-2025-39479

Immediate Actions Required

Deactivate and remove the Smart Notification plugin immediately if running version 10.3 or earlier
Audit WordPress database for signs of compromise including unauthorized admin accounts
Review and rotate all database credentials that may have been exposed
Scan affected WordPress installations for backdoors or webshells that may have been installed

Patch Information

At the time of publication, administrators should check for an updated version of the Smart Notification plugin that addresses this SQL Injection vulnerability. Monitor the Patchstack advisory for patch availability announcements. Until a patched version is confirmed, complete removal of the plugin is recommended.

Workarounds

Remove the Smart Notification plugin entirely until a security patch is released
Implement Web Application Firewall rules to block SQL injection attempts targeting the plugin
Restrict access to the WordPress admin panel and plugin endpoints via IP whitelisting
Enable WordPress security plugins that provide SQL injection protection at the application layer

bash

# Deactivate the vulnerable plugin via WP-CLI
wp plugin deactivate smio-push-notification --path=/var/www/html/wordpress

# Remove the plugin completely
wp plugin delete smio-push-notification --path=/var/www/html/wordpress

# Check for unauthorized admin users
wp user list --role=administrator --path=/var/www/html/wordpress