CVE-2024-23863 in Cups Easy
Summary
by MITRE • 01/26/2024
A vulnerability has been reported in Cups Easy (Purchase & Inventory), version 1.0, whereby user-controlled inputs are not sufficiently encoded, resulting in a Cross-Site Scripting (XSS) vulnerability via /cupseasylive/taxstructuredisplay.php, in the description parameter. Exploitation of this vulnerability could allow a remote attacker to send a specially crafted URL to an authenticated user and steal their session cookie credentials.
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Analysis
by VulDB Data Team • 02/19/2024
The vulnerability identified as CVE-2024-23863 affects Cups Easy (Purchase & Inventory) version 1.0 and represents a critical cross-site scripting flaw that undermines the application's security posture. This vulnerability exists within the /cupseasylive/taxstructuredisplay.php endpoint where the description parameter fails to implement proper input sanitization and output encoding mechanisms. The flaw allows attackers to inject malicious scripts that execute in the context of authenticated users' browsers, creating a significant risk for session hijacking and credential theft.
The technical implementation of this vulnerability stems from inadequate parameter validation and output encoding practices within the application's input handling mechanisms. When user-supplied data is directly incorporated into web page responses without proper sanitization, it creates an opening for attackers to embed malicious javascript code within the description parameter. This weakness aligns with CWE-79 which categorizes cross-site scripting vulnerabilities as a result of insufficient output encoding and improper input validation. The vulnerability operates at the application layer and requires minimal privileges for exploitation since it targets authenticated sessions.
The operational impact of this vulnerability extends beyond simple script execution to encompass full session compromise and potential privilege escalation within the application's context. An attacker could craft a malicious URL containing encoded javascript payloads that would execute when an authenticated user clicks the link, potentially stealing session cookies and gaining unauthorized access to the user's account. This type of attack maps directly to ATT&CK technique T1531 which describes the use of malicious links to steal session tokens and credentials. The vulnerability's exploitation requires social engineering to deliver the malicious payload to target users, making it particularly dangerous in environments where users may not be security-aware.
Mitigation strategies for CVE-2024-23863 should prioritize immediate implementation of proper input validation and output encoding measures across all user-controllable parameters. The application must implement strict sanitization of all inputs received through the description parameter and ensure that all dynamic content is properly escaped before rendering in web pages. Organizations should deploy Content Security Policy headers to limit script execution and implement proper session management practices including secure cookie attributes. The fix should align with OWASP Top Ten security controls and follow secure coding guidelines that prevent XSS vulnerabilities through proper parameter validation and output encoding. Additionally, regular security testing including dynamic application security testing and manual penetration testing should be conducted to identify similar vulnerabilities in other application components.