CVE-2020-20189 in NewPK
Summary
by MITRE • 12/15/2020
SQL Injection vulnerability in NewPK 1.1 via the title parameter to admin\newpost.php.
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Analysis
by VulDB Data Team • 12/17/2020
The SQL injection vulnerability identified in CVE-2020-20189 affects NewPK version 1.1 and represents a critical security flaw that allows attackers to execute arbitrary SQL commands through the title parameter in the admin ewpost.php file. This vulnerability falls under CWE-89 which specifically addresses SQL injection flaws where untrusted data is directly incorporated into SQL query construction without proper sanitization or parameterization. The flaw exists within the administrative interface of the NewPK content management system, making it particularly dangerous as it provides access to privileged functions that control the entire platform's content and configuration.
The technical implementation of this vulnerability occurs when user input from the title parameter is directly concatenated into SQL query strings without adequate input validation or escaping mechanisms. When an attacker submits malicious SQL payloads through the title field, the application fails to properly sanitize this input before incorporating it into database queries. This creates an environment where attackers can manipulate the database structure, extract sensitive information, modify content, or even gain unauthorized access to administrative functions. The vulnerability is particularly concerning because it targets the administrative endpoint ewpost.php which likely handles content creation and modification operations, giving attackers significant control over the platform's data integrity and availability.
The operational impact of this vulnerability extends beyond simple data theft to encompass complete system compromise and potential data destruction. An attacker exploiting this vulnerability could retrieve all database contents including user credentials, administrative sessions, and sensitive configuration data. The attack surface is further expanded as the vulnerability affects the administrative interface, potentially allowing privilege escalation attacks where attackers can elevate their access levels to full administrative control. According to ATT&CK framework, this vulnerability maps to T1190 - Exploit Public-Facing Application and T1071.005 - Application Layer Protocol: Web Protocols, as it represents a common attack vector through web applications that exposes administrative functions to malicious input.
Mitigation strategies for CVE-2020-20189 should prioritize immediate patching of the NewPK application to version 1.1 or higher where the vulnerability has been addressed. Organizations should implement proper input validation and parameterized queries to prevent SQL injection attacks at the code level, ensuring that all user inputs are properly escaped or parameterized before database interaction. The principle of least privilege should be enforced by limiting administrative access to only necessary personnel and implementing additional authentication mechanisms such as multi-factor authentication. Network-level protections including web application firewalls and intrusion detection systems should be deployed to monitor for suspicious SQL injection patterns and block malicious payloads before they reach the vulnerable application. Regular security audits and penetration testing should be conducted to identify similar vulnerabilities in other applications within the organization's infrastructure, as SQL injection remains one of the most prevalent and dangerous web application security flaws. The vulnerability also highlights the importance of keeping all software components updated and following secure coding practices that prevent injection attacks through proper input sanitization and output encoding mechanisms.