CVE-2026-8284 in FlexCity
Summary
by MITRE • 07/21/2026
URL redirection to untrusted site ('open redirect') vulnerability in Universal Software Inc. FlexCity allows Input Data Manipulation.
This issue affects FlexCity: from 5.536.0 through 11052026.
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Analysis
by VulDB Data Team • 07/21/2026
The URL redirection vulnerability in Universal Software Inc. FlexCity represents a critical security flaw that enables attackers to manipulate input data and redirect users to untrusted external websites. This open redirect vulnerability exists within the software's handling of user-provided URLs, creating an exploitable condition where malicious actors can craft specially formatted inputs to initiate unauthorized redirects. The affected versions range from 5.536.0 through 11052026, indicating a substantial release timeline where this security gap persisted. According to CWE-601 classification, this vulnerability falls under the category of URL redirection to untrusted sites, where applications fail to properly validate or sanitize user-supplied redirect parameters. The flaw specifically manifests when the application processes input data containing redirect URLs without adequate sanitization measures, allowing attackers to insert malicious destinations that appear legitimate to end users.
The operational impact of this vulnerability extends beyond simple redirection attacks and creates multiple attack vectors for threat actors. An attacker can exploit this weakness to perform phishing campaigns by redirecting users to malicious sites that mimic legitimate application interfaces or service portals. The vulnerability enables social engineering attacks where users might be tricked into believing they are navigating within a trusted application environment while actually being redirected to harmful external destinations. This opens possibilities for credential theft, malware distribution, and data exfiltration through the manipulated redirect mechanism. From an ATT&CK framework perspective, this vulnerability maps to techniques involving initial access through malicious links and credential harvesting, with potential lateral movement opportunities if the redirected sites contain additional vulnerabilities or if users unknowingly provide credentials to compromised systems.
Mitigation strategies for this open redirect vulnerability require comprehensive input validation and sanitization mechanisms throughout the FlexCity application architecture. Organizations should implement strict URL validation that verifies all redirect destinations against a predetermined whitelist of trusted domains, preventing redirection to arbitrary external sites. The implementation of proper URL encoding and decoding functions alongside robust parameter validation can significantly reduce exploitation opportunities. Security hardening measures must include disabling automatic redirects for user-provided inputs and implementing explicit user consent mechanisms before any redirection occurs. Network-level protections such as web application firewalls should be configured to monitor and block suspicious redirect patterns, while regular security assessments should validate that all input handling components properly sanitize URL parameters. Additionally, developers should adopt secure coding practices that incorporate proper input validation frameworks and avoid direct concatenation of user-provided data into redirect URLs. The vulnerability's persistence across multiple versions indicates the need for comprehensive patch management strategies and thorough regression testing to ensure that future releases maintain proper security controls. Organizations utilizing FlexCity systems should also implement monitoring solutions to detect anomalous redirect behavior that might indicate exploitation attempts, while establishing incident response procedures specifically addressing open redirect attacks to minimize potential damage from successful exploitation.