CVE-2019-9701 in Data Loss Prevention
Summary
by MITRE
DLP 15.5 MP1 and all prior versions may be susceptible to a cross-site scripting (XSS) vulnerability, a type of issue that can enable attackers to inject client-side scripts into web pages viewed by other users. A cross-site scripting vulnerability may be used by attackers to bypass access controls such as the same-origin policy.
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Analysis
by VulDB Data Team • 08/02/2025
The vulnerability identified as CVE-2019-9701 represents a critical cross-site scripting flaw affecting Data Loss Prevention (DLP) software version 15.5 MP1 and all earlier releases. This vulnerability resides within the web-based administrative interface of the DLP solution, creating a pathway for malicious actors to execute unauthorized client-side code within the context of authenticated user sessions. The flaw specifically manifests in how the application processes and renders user-supplied input within web page elements, failing to properly sanitize or escape potentially dangerous script content before displaying it to end users.
Cross-site scripting vulnerabilities of this nature typically fall under CWE-79, which categorizes improper neutralization of input during web page generation as a fundamental weakness in web application security. The vulnerability operates by allowing attackers to inject malicious JavaScript code through input fields or parameters that are subsequently rendered in web pages viewed by other users. This particular flaw in the DLP system's web interface creates a significant risk because administrators and users who interact with the DLP management console may unknowingly execute malicious payloads when viewing compromised web content.
The operational impact of this vulnerability extends beyond simple script execution, as it can be leveraged to bypass critical access controls that normally protect system resources. Through the exploitation of the XSS vulnerability, attackers can potentially impersonate legitimate users, access sensitive administrative functions, or extract confidential information from the DLP system. The same-origin policy, which normally prevents malicious scripts from accessing resources across different domains, becomes ineffective when an attacker successfully injects code that executes within the legitimate user's browser context. This allows for session hijacking, privilege escalation, and unauthorized access to the DLP system's administrative capabilities.
From an adversarial perspective, this vulnerability aligns with ATT&CK technique T1059.007, which covers the execution of scripts through web applications. Attackers could utilize this flaw to establish persistent access to the DLP environment, potentially compromising the organization's data protection mechanisms. The vulnerability is particularly concerning because DLP systems are designed to protect sensitive data, and compromising such systems creates a paradox where the very tools meant to prevent data exfiltration become vulnerable to exploitation. Organizations using affected DLP versions face significant risk of unauthorized access to their data protection configurations and potentially sensitive data flows that the DLP system is meant to monitor and control. The remediation approach involves applying the vendor's security patches and updates, implementing proper input validation and output encoding mechanisms, and conducting thorough security assessments of web applications to prevent similar vulnerabilities from emerging in future versions.
The exploitation of this vulnerability demonstrates the critical importance of secure coding practices in web applications, particularly when dealing with administrative interfaces that handle sensitive configuration data. The flaw represents a failure in the principle of least privilege and proper input sanitization, where user-supplied content should never be directly rendered without adequate security measures. Organizations should implement comprehensive web application security testing, including automated scanning and manual penetration testing, to identify similar vulnerabilities in their web-based systems and prevent attackers from leveraging these weaknesses to compromise their security infrastructure.