Stored XSS in PHP HR Management System: CVE-free Advisory with PoC

Vulnerability Overview Vulnerability Type: Stored Cross-Site Scripting (Stored XSS) Vulnerability Description: The event creation functionality in the Human Resource Management System in PHP contains a Stored Cross-Site Scripting (XSS) vulnerability. When the application processes controlled input submitted via the parameter and stores it in , an attacker can inject malicious content if the submitted value contains malicious HTML or JavaScript tags and these values are rendered in the application interface without appropriate context-aware output encoding. Affected Versions: Human Resource Management System in PHP — the version should be confirmed from the distributed source code package. Severity: Medium Impact Scope Affected File: Affected Parameter: HTTP Method: POST Impact: - Execution of arbitrary JavaScript in the victim's browser - Modification of content displayed to the user - Performing actions as the victim user - Phishing attacks using injected application content - Targeting administrators viewing malicious events - Accessing sensitive information within the application context - Potential compromise of user sessions based on cookie attributes and other application security controls Remediation Output Encoding: All user-controlled data must be properly encoded before being inserted into HTML responses. For example: Input Validation: The application should validate event subject inputs against expected formats. For example: Use a Secure HTML Sanitizer: If the application allows users to submit HTML, use a well-maintained whitelist-based HTML sanitizer. Implement Content Security Policy: Implement a strict Content Security Policy to mitigate the impact of successful XSS exploitation. For example: Proof of Concept (POC) Code Vulnerability Classification CWE: CWE-79 — Improper Neutralization of Input During Web Page Generation (Cross-site Scripting) OWASP: OWASP Top 10: A03:2021 — Injection References Code Project — Human Resource Management System in PHP CWE-79 — Cross-site Scripting OWASP Cross-Site Scripting (XSS) Prevention Cheat Sheet

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Stored XSS in PHP HR Management System: CVE-free Advisory with PoC

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