CVE-2026-1429 in Single Sign-On Portal System
Summary
by MITRE • 01/26/2026
Single Sign-On Portal System developed by WellChoose has a Reflected Cross-site Scripting vulnerability, allowing authenticated remote attackers to execute arbitrary JavaScript codes in user's browser through phishing attacks.
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Analysis
by VulDB Data Team • 03/12/2026
The vulnerability identified as CVE-2026-1429 represents a critical security flaw within the Single Sign-On Portal System manufactured by WellChoose. This system serves as a central authentication mechanism that allows users to access multiple applications through a single login session, making it a prime target for attackers seeking to compromise user sessions and gain unauthorized access to sensitive corporate resources. The vulnerability specifically manifests as a reflected cross-site scripting flaw that undermines the security model of the authentication system.
The technical implementation of this vulnerability stems from insufficient input validation and output encoding within the portal's web application components. When authenticated users navigate to specific URLs or interact with certain parameters within the system, the application fails to properly sanitize user-supplied input before reflecting it back to the browser. This allows an attacker to inject malicious javascript code through carefully crafted URLs or HTTP parameters that are then executed in the victim's browser context. The reflected nature of this vulnerability means that the malicious payload is not stored on the server but rather injected through user interaction, typically via phishing emails or malicious links.
The operational impact of this vulnerability extends beyond simple script execution, as it provides attackers with a powerful vector for session hijacking and privilege escalation. Once an attacker successfully delivers a malicious payload through phishing, they can potentially steal user session cookies, execute commands on behalf of authenticated users, or redirect victims to malicious websites that appear legitimate. This creates a significant risk for organizations that rely on the WellChoose SSO system for accessing critical business applications, as compromised user sessions can lead to unauthorized data access, system manipulation, and potential lateral movement within the network. The vulnerability is particularly dangerous because it requires minimal user interaction beyond clicking a malicious link, making it highly effective for social engineering campaigns.
The attack vector for this vulnerability aligns with several tactics outlined in the mitre att&ck framework, specifically encompassing initial access through phishing campaigns and privilege escalation via session manipulation. The vulnerability maps to cwe-79, which describes cross-site scripting flaws in web applications, and represents a classic example of how authentication systems can be undermined through input validation failures. Organizations utilizing this system should implement immediate mitigations including input sanitization, output encoding, and proper parameter validation across all web application interfaces. Additionally, implementing content security policies and educating users about phishing awareness can significantly reduce the risk of exploitation. The vulnerability demonstrates the critical importance of secure coding practices in authentication systems and highlights the need for comprehensive security testing of all components within identity and access management solutions.