CVE-2025-3800: WCMS SQLi Vulnerability Explained

CVE-2025-3800 Overview

A critical SQL injection vulnerability has been identified in WCMS version 11, specifically affecting the AnonymousController.php file. The vulnerability exists due to improper input validation of the mobile_phone parameter, allowing remote attackers to inject malicious SQL statements. The exploit has been publicly disclosed, and additional parameters may also be susceptible to similar injection attacks.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to extract, modify, or delete sensitive database information without authentication. The public disclosure of this exploit increases the risk of active exploitation.

Affected Products

• WCMS version 11.0
• app/controllers/AnonymousController.php component
• Systems utilizing the mobile_phone parameter functionality

Discovery Timeline

• 2025-04-19 - CVE-2025-3800 published to NVD
• 2025-07-15 - Last updated in NVD database

Technical Details for CVE-2025-3800

Vulnerability Analysis

This SQL injection vulnerability in WCMS 11 stems from inadequate sanitization of user-supplied input in the AnonymousController.php file. The mobile_phone parameter is directly incorporated into SQL queries without proper parameterization or escaping, enabling attackers to manipulate database operations remotely. The vulnerability is classified under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), which encompasses injection flaws where user input is not properly validated before being used in commands or queries.

The network-accessible nature of this vulnerability means that attackers can exploit it without requiring any prior authentication or local access to the target system. The publicly available exploit information further elevates the risk profile, as threat actors can readily leverage existing proof-of-concept code. Additionally, the advisory notes that other parameters within the application may be vulnerable to similar injection attacks.

Root Cause

The root cause of this vulnerability is the failure to implement proper input validation and parameterized queries in the AnonymousController.php controller. When handling the mobile_phone parameter, the application directly concatenates user input into SQL query strings rather than using prepared statements or input sanitization mechanisms. This classic SQL injection anti-pattern allows attackers to break out of the intended query context and execute arbitrary SQL commands.

Attack Vector

The attack can be executed remotely over the network without requiring authentication. An attacker crafts a malicious HTTP request containing SQL injection payloads in the mobile_phone parameter. When the vulnerable AnonymousController.php processes this request, the unsanitized input is passed directly to the database layer, executing the attacker's injected SQL statements.

The exploitation typically involves manipulating the mobile_phone parameter value to include SQL syntax characters and commands that alter the intended query logic. This can enable data exfiltration through UNION-based injection, authentication bypass, or even command execution depending on database configuration and privileges. Technical details and proof-of-concept information are available in the GitHub Vulnerability Issue and VulDB entry #305653.

Detection Methods for CVE-2025-3800

Indicators of Compromise

• Unusual or malformed values in the mobile_phone parameter containing SQL syntax characters such as single quotes, double dashes, semicolons, or UNION keywords
• Database error messages appearing in application logs or responses indicating SQL syntax errors
• Unexpected database queries or elevated query execution times originating from web application processes
• Anomalous data access patterns targeting user tables or sensitive information stores

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block SQL injection patterns in the mobile_phone parameter and related endpoints
• Configure database activity monitoring to alert on suspicious query patterns, including UNION-based attacks and error-based injection attempts
• Deploy intrusion detection systems (IDS) with signatures for common SQL injection attack vectors targeting PHP applications
• Enable detailed logging on the WCMS application to capture all requests to AnonymousController.php for forensic analysis

Monitoring Recommendations

• Monitor access logs for requests to app/controllers/AnonymousController.php with suspicious parameter values
• Set up alerts for database query anomalies, particularly those involving user input concatenation or unusual WHERE clause modifications
• Review application error logs for SQL-related exceptions that may indicate exploitation attempts
• Track failed and successful database authentication events for potential privilege escalation indicators

How to Mitigate CVE-2025-3800

Immediate Actions Required

• Restrict network access to the WCMS application to trusted IP addresses only until a patch is applied
• Implement input validation rules to reject mobile_phone parameter values containing SQL metacharacters
• Deploy a web application firewall (WAF) with SQL injection detection rules as a compensating control
• Review application logs for evidence of prior exploitation attempts and conduct incident response if necessary

Patch Information

As of the last NVD update on 2025-07-15, no official vendor patch has been documented for this vulnerability. Organizations using WCMS 11 should monitor the vendor's official channels and the VulDB entry for patch announcements. In the absence of an official fix, implementing the workarounds and compensating controls listed below is strongly recommended.

Workarounds

• Apply server-side input validation to strictly sanitize the mobile_phone parameter, allowing only numeric characters and standard phone number formatting
• Implement prepared statements or parameterized queries in the AnonymousController.php file if source code modification is possible
• Use database user accounts with minimal privileges for the web application to limit the impact of successful SQL injection
• Consider temporarily disabling the affected functionality if it is not business-critical until a permanent fix is available

# Example WAF rule to block SQL injection patterns (ModSecurity format)
SecRule ARGS:mobile_phone "@detectSQLi" \
    "id:100001,\
    phase:2,\
    deny,\
    status:403,\
    log,\
    msg:'SQL Injection attempt detected in mobile_phone parameter - CVE-2025-3800'"