CVE-2025-39403: WPAMS Apartment Management SQLi Flaw

CVE-2025-39403 Overview

CVE-2025-39403 is a SQL Injection vulnerability in the mojoomla WPAMS (WordPress Apartment Management System) plugin. The flaw stems from improper neutralization of special elements in SQL commands [CWE-89]. It affects all WPAMS versions up to and including 44.0 (released 17-08-2023). An authenticated attacker with low privileges can inject malicious SQL queries over the network to access confidential database content and impact availability.

Critical Impact
Authenticated attackers can extract sensitive data from the underlying WordPress database and disrupt application availability through crafted SQL payloads.

Affected Products

mojoomla WPAMS (WordPress Apartment Management System) plugin
WPAMS versions from n/a through <= 44.0 (17-08-2023)
WordPress installations with the apartment-management plugin enabled

Discovery Timeline

2025-05-19 - CVE-2025-39403 published to NVD
2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-39403

Vulnerability Analysis

The WPAMS plugin fails to properly sanitize user-supplied input before incorporating it into SQL queries. This classic SQL Injection weakness allows attackers to break out of the intended query context and append arbitrary SQL statements. The scope is marked as changed, meaning a successful exploit can affect resources beyond the vulnerable component's security boundary. Confidentiality impact is high, while availability impact is low. Integrity is not directly affected, suggesting the vulnerability primarily enables data extraction and limited disruption rather than data modification.

Root Cause

The root cause is the absence of parameterized queries or prepared statements when handling user input within the apartment-management plugin. The plugin concatenates request parameters directly into SQL statements without using the WordPress $wpdb->prepare() API or proper escaping functions such as esc_sql(). This [CWE-89] weakness allows special characters like single quotes, comments, and UNION operators to alter query logic.

Attack Vector

Exploitation requires network access to the WordPress site and low-privilege authentication, such as a subscriber or contributor account. The attacker submits crafted input through a vulnerable plugin endpoint, typically via HTTP GET or POST parameters. No user interaction is required. Because authentication is needed, attackers commonly chain this vulnerability with credential stuffing, weak password brute-forcing, or self-registration on sites that allow it.

No verified public proof-of-concept code is available. Refer to the Patchstack SQL Injection Vulnerability advisory for technical details.

Detection Methods for CVE-2025-39403

Indicators of Compromise

HTTP requests to WPAMS plugin endpoints containing SQL metacharacters such as ', --, UNION SELECT, SLEEP(, or INFORMATION_SCHEMA
Unexpected SELECT queries against wp_users or plugin-specific tables originating from low-privileged sessions
Spikes in database errors or slow queries logged by MySQL/MariaDB tied to plugin request URIs

Detection Strategies

Deploy a Web Application Firewall (WAF) ruleset that inspects parameters submitted to apartment-management plugin pages for SQL injection signatures
Enable WordPress audit logging to correlate authenticated user actions with anomalous database activity
Review MySQL general or slow query logs for query patterns containing tautologies (OR 1=1), boolean-based blind probes, or time-based delays

Monitoring Recommendations

Forward web server access logs and database query logs to a centralized SIEM for correlation and retention
Alert on authenticated low-privilege accounts generating high volumes of requests to plugin endpoints
Monitor outbound traffic from the web host for unusual data egress that may indicate database exfiltration

How to Mitigate CVE-2025-39403

Immediate Actions Required

Disable or remove the WPAMS plugin until a patched version is confirmed available from the vendor
Audit existing WordPress user accounts and revoke or rotate credentials for low-privileged users that are not strictly required
Restrict access to WordPress login and plugin endpoints by IP allowlist where feasible

Patch Information

At the time of publication, no fixed version is identified beyond WPAMS 44.0 (17-08-2023). Consult the Patchstack advisory for the latest remediation status and check the WordPress.org plugin repository for vendor updates.

Workarounds

Deploy a virtual patch via WAF rules that block SQL injection patterns targeting the apartment-management plugin
Enforce least-privilege principles by removing self-registration and limiting subscriber-level account creation
Apply database-level controls so the WordPress database user has only the privileges required for normal operation

bash

# Example: disable the WPAMS plugin via WP-CLI until a patch is available
wp plugin deactivate apartment-management
wp plugin delete apartment-management

# Disable open user registration in WordPress
wp option update users_can_register 0