CVE-2020-0872 in Application Inspector
Summary
by MITRE
A remote code execution vulnerability exists in Application Inspector version v1.0.23 or earlier when the tool reflects example code snippets from third-party source files into its HTML output, aka 'Remote Code Execution Vulnerability in Application Inspector'.
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Analysis
by VulDB Data Team • 05/10/2025
The vulnerability identified as CVE-2020-0872 represents a critical remote code execution flaw within Application Inspector version 1.0.23 and earlier releases. This security weakness stems from the tool's improper handling of third-party source code snippets that are reflected into its HTML output, creating an environment where malicious actors can potentially execute arbitrary code on systems running the affected software. The vulnerability specifically manifests when the application inspector processes and displays example code from external sources without adequate sanitization or validation of the input content.
The technical root cause of this vulnerability aligns with CWE-79, which describes Cross-Site Scripting (XSS) vulnerabilities that occur when applications fail to properly validate or sanitize user-provided data before incorporating it into web pages. In this case, the application inspector acts as an intermediary that processes code examples from third-party sources and renders them within HTML output, creating a potential attack vector where malicious code embedded within these examples can be executed in the context of the user's browser. The flaw occurs because the tool does not adequately escape or filter special characters that could be interpreted as executable code, particularly when dealing with JavaScript or other scripting languages that might be present in the reflected code snippets.
From an operational perspective, this vulnerability poses significant risks to organizations that rely on Application Inspector for code analysis and security assessment. An attacker could exploit this flaw by crafting malicious code examples that, when processed by the inspector, would execute arbitrary commands on the target system. The impact extends beyond simple code execution, as successful exploitation could allow attackers to access sensitive system resources, escalate privileges, or potentially establish persistent backdoors within the network environment. The vulnerability is particularly concerning because it affects a code analysis tool that is likely used in security-sensitive contexts, making it an attractive target for adversaries seeking to compromise security assessment processes.
The attack surface for CVE-2020-0872 can be mapped to several ATT&CK techniques including T1059.007 for Command and Scripting Interpreter and T1566 for Phishing with Malicious Attachments, as attackers might deliver malicious code examples through various vectors. Organizations using this tool are particularly vulnerable if they process code examples from untrusted sources, as the inspector becomes a conduit for executing malicious payloads. The vulnerability's severity is amplified by the fact that it operates silently in the background, making detection difficult for security teams who may not immediately recognize the exploitation attempts. Mitigation strategies should include immediate patching to version 1.0.24 or later, implementation of strict input validation and sanitization procedures, and network segmentation to limit the potential impact of successful exploitation attempts.
The remediation approach for this vulnerability requires a multi-layered strategy that addresses both the immediate technical flaw and broader security posture considerations. Organizations must first update to the patched version of Application Inspector to eliminate the core vulnerability. Additionally, implementing proper content security policies, input validation, and output encoding mechanisms will help prevent similar issues in other components of the security infrastructure. Security teams should also conduct comprehensive vulnerability assessments to identify any other instances where similar code reflection patterns might exist within their code analysis tools, as this vulnerability type often indicates broader architectural weaknesses in input handling processes that require systematic review and remediation across the entire application security stack.