CVE-2023-3562 in PHP CRM Platform
Summary
by MITRE • 07/10/2023
A vulnerability has been found in GZ Scripts PHP CRM Platform 1.8 and classified as problematic. This vulnerability affects unknown code of the file /index.php. The manipulation of the argument action leads to cross site scripting. The attack can be initiated remotely. The identifier of this vulnerability is VDB-233356. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 07/25/2023
The vulnerability identified as CVE-2023-3562 represents a critical cross-site scripting flaw within the GZ Scripts PHP CRM Platform version 1.8. This security weakness resides in the /index.php file and demonstrates a classic input validation failure that allows malicious actors to inject arbitrary JavaScript code into web applications. The vulnerability specifically manifests when the action parameter is manipulated, creating an attack vector that can be exploited through remote execution without requiring local system access or user interaction beyond visiting a maliciously crafted URL. The absence of vendor response to early disclosure attempts raises concerns about the platform's security maintenance and the potential for prolonged exposure of this vulnerability in production environments.
The technical implementation of this XSS vulnerability stems from insufficient sanitization of user-supplied input within the action parameter handling mechanism. When the application processes the action argument without proper validation or output encoding, it inadvertently executes malicious scripts within the context of legitimate user sessions. This flaw aligns with CWE-79, which categorizes cross-site scripting as a fundamental web application security weakness occurring when applications fail to properly validate or encode user input before incorporating it into dynamically generated web pages. The remote exploitation capability means that attackers can deliver malicious payloads through various vectors including phishing emails, compromised websites, or social media platforms, making this vulnerability particularly dangerous for organizations relying on the platform for customer relationship management.
The operational impact of this vulnerability extends beyond simple script execution, potentially enabling attackers to hijack user sessions, steal sensitive customer data, modify CRM records, or even escalate privileges within the application. Given that CRM platforms typically contain highly sensitive information including personal customer details, financial data, and business communications, the potential for data breaches and regulatory compliance violations is substantial. The vulnerability's classification as remote exploitation means that organizations may be exposed to attacks from anywhere on the internet, with no requirement for physical access or complex attack chains. Security professionals should consider this vulnerability in relation to ATT&CK framework tactic TA0001 (Initial Access) and technique T1566 (Phishing), as the attack surface aligns with common threat actor methodologies for gaining unauthorized access to web applications.
Mitigation strategies for CVE-2023-3562 should prioritize immediate implementation of input validation and output encoding measures within the affected application code. Organizations should deploy proper parameter validation routines that sanitize all user inputs, particularly those used in dynamic page generation or URL parameter handling. The implementation of Content Security Policy headers can provide additional defense-in-depth measures to prevent execution of unauthorized scripts even if the primary vulnerability is not fully patched. Regular security assessments and code reviews should be conducted to identify similar input validation weaknesses throughout the application. Given the vendor's lack of response, organizations should consider alternative CRM solutions or implement temporary network-level protections such as web application firewalls to mitigate the risk until a proper security patch is available. The vulnerability serves as a reminder of the importance of maintaining up-to-date security practices and establishing clear communication channels with software vendors for timely vulnerability resolution.