CVE-2023-0287 in favorites-web
Summary
by MITRE • 01/13/2023
A vulnerability was found in ityouknow favorites-web. It has been rated as problematic. Affected by this issue is some unknown functionality of the component Comment Handler. The manipulation leads to cross site scripting. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. VDB-218294 is the identifier assigned to this vulnerability.
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Analysis
by VulDB Data Team • 02/07/2023
The vulnerability identified as CVE-2023-0287 affects the ityouknow favorites-web application, specifically targeting the Comment Handler component within the system. This cross-site scripting vulnerability represents a significant security risk that allows attackers to inject malicious scripts into web pages viewed by other users. The issue has been classified as problematic due to its potential for widespread impact and the fact that a public exploit has been disclosed, making it immediately actionable by threat actors. The vulnerability exists within the comment handling functionality, which suggests that any user input processed through this component could serve as an attack vector for executing malicious code in the context of other users' browsers.
The technical flaw manifests as a classic cross-site scripting vulnerability where the Comment Handler fails to properly sanitize or validate user input before rendering it on web pages. This inadequate input validation allows attackers to inject malicious JavaScript code through comment fields or other user-contributed content areas. The remote exploitation capability means that attackers do not need physical access to the system or direct network access to the target server, as the vulnerability can be triggered through web-based attacks. The attack vector typically involves crafting malicious payloads that are then executed when other users view the affected content, potentially leading to session hijacking, credential theft, or redirection to malicious sites. This vulnerability directly maps to CWE-79, which specifically addresses cross-site scripting flaws in web applications.
The operational impact of CVE-2023-0287 extends beyond simple data theft or service disruption, as it can enable persistent attacks against users of the favorites-web application. When exploited, this vulnerability could allow attackers to establish persistent presence within user sessions, potentially compromising sensitive data or enabling further attacks through compromised user credentials. The fact that a public exploit exists significantly amplifies the risk, as it removes the need for advanced technical skills to launch attacks against vulnerable systems. Organizations using this application may experience unauthorized access to user data, potential account takeovers, and damage to their reputation due to compromised user trust. The vulnerability also creates opportunities for attackers to use the compromised application as a stepping stone for broader network infiltration attacks, aligning with ATT&CK technique T1566 for credential harvesting and T1505 for web shell deployment.
Mitigation strategies for CVE-2023-0287 should prioritize immediate application of security patches or updates provided by the software vendor, as this represents the most effective approach to resolving the underlying vulnerability. Organizations should implement comprehensive input validation and output encoding mechanisms to prevent malicious scripts from being executed in user contexts. The Comment Handler component should be reviewed for proper sanitization of all user inputs, with special attention to HTML and JavaScript encoding. Network-based mitigations such as web application firewalls can provide additional protection layers, though these should not be considered replacements for proper code-level fixes. Security teams should monitor for exploitation attempts and implement proper logging and alerting for suspicious activities related to comment submission or viewing. Regular security assessments and code reviews should be conducted to identify similar vulnerabilities in other components of the application, as the presence of one XSS vulnerability often indicates potential for additional similar issues throughout the codebase.