CVE-2018-0570 in BaserCMS
Summary
by MITRE
Cross-site scripting vulnerability in baserCMS (baserCMS 4.1.0.1 and earlier versions, baserCMS 3.0.15 and earlier versions) allows remote authenticated attackers to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 02/22/2020
The vulnerability identified as CVE-2018-0570 represents a critical cross-site scripting flaw within the baserCMS content management system affecting multiple version ranges including baserCMS 4.1.0.1 and earlier, as well as baserCMS 3.0.15 and earlier versions. This vulnerability falls under the CWE-79 category of Cross-Site Scripting, which is classified as a fundamental web application security weakness that enables attackers to inject malicious scripts into web pages viewed by other users. The flaw specifically affects authenticated users who can leverage this vulnerability to execute arbitrary web scripts or HTML code within the context of the victim's browser, making it particularly dangerous in environments where administrative privileges are held by legitimate users.
The technical implementation of this vulnerability stems from inadequate input validation and output encoding mechanisms within the baserCMS application. Attackers with valid authentication credentials can manipulate various input fields or parameters that are not properly sanitized before being rendered in web responses. This allows malicious payloads to be stored and subsequently executed when other users access the affected pages, creating a persistent XSS vector that can be exploited across different user sessions. The unspecified vectors mentioned in the description suggest that the vulnerability may exist across multiple components of the CMS, potentially including content management interfaces, user profile pages, or administrative panels where user-supplied data is processed without adequate security controls.
The operational impact of CVE-2018-0570 extends beyond simple script injection, as authenticated attackers can potentially escalate privileges, steal session cookies, redirect users to malicious websites, or even execute more sophisticated attacks such as credential theft or data exfiltration. This vulnerability directly violates the principle of least privilege and can be leveraged as a stepping stone for further attacks within the application ecosystem. The threat model aligns with ATT&CK technique T1059.007 for Command and Scripting Interpreter: JavaScript, where attackers can execute malicious JavaScript code in the context of the victim's browser session. Organizations using affected baserCMS versions face significant risk of unauthorized access to sensitive data and potential system compromise, particularly in environments where users have elevated privileges or where the CMS handles confidential information.
Mitigation strategies for CVE-2018-0570 should prioritize immediate remediation through official patches provided by the baserCMS development team, as well as implementing comprehensive input validation and output encoding controls across all user-facing interfaces. Organizations should enforce strict content security policies, implement proper sanitization of user inputs, and establish robust monitoring mechanisms to detect anomalous activities that may indicate exploitation attempts. The vulnerability demonstrates the critical importance of maintaining up-to-date software versions and implementing defense-in-depth strategies that include web application firewalls, regular security assessments, and user access controls. Additionally, security awareness training for administrators and content creators can help reduce the risk of successful exploitation by ensuring proper handling of user-generated content and understanding of secure coding practices that prevent such vulnerabilities from emerging in the first place.