CVE-2026-6379: WP Photo Album Plus SQLi Vulnerability

CVE-2026-6379 Overview

CVE-2026-6379 is an unauthenticated SQL injection vulnerability in the WP Photo Album Plus WordPress plugin in versions prior to 9.1.11.001. The plugin fails to properly sanitize and escape a user-supplied parameter before incorporating it into a SQL query. Unauthenticated attackers can inject arbitrary SQL statements over the network without user interaction. The flaw is tracked under CWE-89 (Improper Neutralization of Special Elements used in an SQL Command).

Critical Impact

Remote, unauthenticated attackers can manipulate backend SQL queries to extract sensitive database contents from affected WordPress sites.

Affected Products

• WP Photo Album Plus WordPress plugin versions before 9.1.11.001
• WordPress sites with the vulnerable plugin installed and activated
• All hosting environments running the plugin regardless of underlying server stack

Discovery Timeline

• 2026-05-18 - CVE-2026-6379 published to the National Vulnerability Database (NVD)
• 2026-05-18 - Last updated in NVD database

Technical Details for CVE-2026-6379

Vulnerability Analysis

The vulnerability resides in the WP Photo Album Plus plugin's request handling logic. The plugin accepts a parameter from HTTP requests and concatenates it into a SQL statement without parameterization or escaping. Because the affected entry point does not require authentication, any remote user can submit crafted input. Successful injection allows attackers to read arbitrary database tables, including the wp_users table containing password hashes and session tokens.

The scope change reflected in the issue indicates that exploitation impacts resources beyond the vulnerable component itself. Attackers can pivot from SQL execution to broader information disclosure across the WordPress database. Refer to the WPScan Vulnerability Advisory for additional technical details.

Root Cause

The root cause is missing input sanitization and the absence of prepared statements when constructing a SQL query. WordPress provides $wpdb->prepare() for parameterized queries, but the affected code path concatenates untrusted input directly. This pattern matches [CWE-89] SQL Injection and is a recurring class of defect in WordPress plugins.

Attack Vector

The attack vector is network-based and requires no authentication or user interaction. An attacker sends a crafted HTTP request containing SQL metacharacters in the vulnerable parameter. The injected payload executes within the WordPress database context. Typical exploitation uses UNION-based or time-based blind techniques to enumerate tables and extract data such as administrator credentials, API keys, and personally identifiable information.

Detection Methods for CVE-2026-6379

Indicators of Compromise

• HTTP requests to WP Photo Album Plus endpoints containing SQL keywords such as UNION SELECT, SLEEP(, BENCHMARK(, or INFORMATION_SCHEMA
• Unusual database errors written to PHP or web server logs originating from the plugin's PHP files
• Outbound database queries returning unexpectedly large result sets from anonymous sessions
• Newly created WordPress administrator accounts or modified wp_users rows shortly after suspicious requests

Detection Strategies

• Inspect web server access logs for query strings containing URL-encoded SQL syntax targeting plugin endpoints
• Enable WordPress debug logging and monitor wp-content/debug.log for database errors referencing plugin tables
• Deploy Web Application Firewall (WAF) signatures for [CWE-89] payloads targeting wppa request parameters
• Correlate anonymous HTTP requests with subsequent administrative actions to identify post-exploitation activity

Monitoring Recommendations

• Forward web server and WordPress audit logs to a centralized analytics platform for query pattern analysis
• Alert on response time anomalies indicative of time-based blind SQL injection probes
• Monitor outbound traffic from the web host for data exfiltration following suspicious inbound requests
• Track plugin version inventory across WordPress deployments to identify unpatched installations

How to Mitigate CVE-2026-6379

Immediate Actions Required

• Upgrade WP Photo Album Plus to version 9.1.11.001 or later on all WordPress installations
• Audit wp_users, wp_usermeta, and wp_options tables for unauthorized modifications
• Rotate WordPress administrator passwords, API keys, and database credentials if exploitation is suspected
• Review web server access logs for prior exploitation attempts dating back to the plugin's installation

Patch Information

The vendor addressed the issue in WP Photo Album Plus version 9.1.11.001. The fix introduces proper sanitization and parameterized queries on the affected code path. Site administrators should apply the update through the WordPress plugin management interface or via WP-CLI. See the WPScan Vulnerability Advisory for confirmation of the fixed release.

Workarounds

• Deactivate and remove the WP Photo Album Plus plugin until patching is feasible
• Deploy WAF rules that block SQL metacharacters on requests to plugin endpoints
• Restrict access to the plugin's request handlers using web server access controls until the patch is applied
• Apply principle of least privilege to the WordPress database user to limit injection impact

# Update WP Photo Album Plus via WP-CLI
wp plugin update wp-photo-album-plus --version=9.1.11.001

# Verify installed version
wp plugin get wp-photo-album-plus --field=version