CVE-2023-4864 in Take-Note App
Summary
by MITRE • 09/10/2023
A vulnerability, which was classified as problematic, was found in SourceCodester Take-Note App 1.0. This affects an unknown part of the file index.php. The manipulation of the argument noteContent with the input <script>alert('xss')</script> leads to cross site scripting. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The identifier VDB-239349 was assigned to this vulnerability.
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Analysis
by VulDB Data Team • 04/22/2025
This vulnerability represents a classic cross-site scripting flaw in the SourceCodester Take-Note App version 1.0, specifically within the index.php file where user input is improperly handled. The vulnerability arises from insufficient input validation and output encoding mechanisms that fail to sanitize malicious script content before it is rendered in web pages. When a user submits a noteContent parameter containing the payload <script>alert('xss')</script>, the application processes this input without proper sanitization, allowing the malicious javascript code to execute in the context of other users' browsers who view the affected content. This classification aligns with CWE-79, which defines cross-site scripting as the failure to properly encode output data, making it executable as script code in the browser.
The remote exploitation capability of this vulnerability means that attackers can compromise user sessions and potentially escalate privileges without requiring physical access to the system. The attack vector operates through web-based interfaces where users interact with the note-taking application, making it particularly dangerous as it can affect any user who views maliciously crafted notes. This vulnerability directly maps to ATT&CK technique T1531, which involves using malicious scripts to compromise user sessions, and T1059.007, which covers scripting languages used for execution. The fact that this exploit has been publicly disclosed and is available for use significantly increases the risk profile, as it removes the requirement for advanced exploitation techniques and allows even less sophisticated attackers to leverage this weakness.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable more sophisticated attacks including session hijacking, credential theft, and data exfiltration. An attacker could potentially use this vulnerability to inject malicious scripts that steal cookies, redirect users to phishing sites, or perform actions on behalf of authenticated users. The vulnerability affects the core functionality of the note-taking application, making it particularly concerning for users who store sensitive information in the system. Organizations using this application face potential data breaches, unauthorized access to user information, and possible compliance violations if sensitive data is compromised. The vulnerability's presence in a note-taking application is especially problematic as users may store personal information, business data, or confidential communications that could be accessed through this XSS vector.
Mitigation strategies should focus on implementing proper input validation and output encoding mechanisms throughout the application. The recommended approach includes sanitizing all user input before processing, implementing Content Security Policy headers to limit script execution, and using parameterized queries or proper escaping mechanisms for dynamic content rendering. Organizations should also consider implementing web application firewalls to detect and block malicious payloads, conducting regular security assessments to identify similar vulnerabilities, and ensuring all users are updated to patched versions of the application. Additionally, user education regarding the dangers of clicking on suspicious links or content within web applications can help reduce exploitation success rates, while regular monitoring of application logs for suspicious activity can aid in early detection of potential attacks. The vulnerability demonstrates the critical importance of input validation in web applications and the potential consequences of inadequate security measures in user-facing interfaces.