CVE-2017-17896 in Job Site Script
Summary
by MITRE
Readymade Job Site Script has XSS via the keyword parameter to the /job URI.
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Analysis
by VulDB Data Team • 12/18/2019
The vulnerability identified as CVE-2017-17896 affects the Readymade Job Site Script, a web application designed for job listing and management services. This particular flaw represents a classic cross-site scripting vulnerability that allows attackers to inject malicious scripts into web pages viewed by other users. The vulnerability specifically manifests through the keyword parameter within the /job URI endpoint, making it accessible through standard web browsing mechanisms. The affected application fails to properly sanitize or escape user input before incorporating it into dynamic web content, creating an exploitable condition that violates fundamental web security principles.
The technical implementation of this vulnerability stems from inadequate input validation and output encoding practices within the application's codebase. When users submit search queries through the keyword parameter, the application processes this input without sufficient sanitization measures. The script does not employ proper context-aware escaping mechanisms that would prevent malicious code from being executed in the browser context of other users. This weakness falls under the CWE-79 category of Cross-Site Scripting, specifically representing a stored or reflected XSS variant depending on how the malicious payload is delivered and persisted. The vulnerability allows attackers to execute arbitrary JavaScript code within the victim's browser session, potentially leading to session hijacking, credential theft, or data exfiltration.
The operational impact of CVE-2017-17896 extends beyond simple script execution, as it provides attackers with a foothold for more sophisticated attacks within the application environment. An attacker could leverage this vulnerability to steal session cookies, redirect users to malicious sites, or manipulate the application's functionality to gain unauthorized access to user accounts. The reflected nature of this XSS means that successful exploitation requires user interaction with a malicious link containing the crafted payload, typically delivered through phishing campaigns or social engineering tactics. This vulnerability aligns with ATT&CK technique T1566 which describes social engineering attacks that leverage XSS vulnerabilities to compromise user sessions and escalate privileges within web applications.
Mitigation strategies for this vulnerability require immediate implementation of robust input validation and output encoding mechanisms throughout the application's codebase. The primary defense involves implementing context-aware escaping for all user-supplied data before rendering it in web pages, particularly within HTML contexts, JavaScript contexts, and URL parameters. Organizations should deploy Content Security Policy (CSP) headers to limit script execution and prevent unauthorized code injection. Additionally, regular security code reviews and automated vulnerability scanning should be implemented to identify similar issues in other application components. The fix should include proper parameter validation that rejects or sanitizes potentially malicious input patterns while maintaining legitimate functionality. This vulnerability demonstrates the critical importance of following secure coding practices and adhering to web application security standards such as those outlined in OWASP Top Ten and the CWE catalog to prevent common injection vulnerabilities.