CVE-2019-7634 in SUAP
Summary
by MITRE
SUAP V2 allows XSS during the update of user information.
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Analysis
by VulDB Data Team • 05/06/2025
The vulnerability identified as CVE-2019-7634 affects SUAP V2 systems and represents a cross-site scripting flaw that occurs during user information update processes. This vulnerability resides within the web application's input validation mechanisms and demonstrates a critical weakness in how user-supplied data is handled during administrative operations. The flaw enables malicious actors to inject malicious scripts into user information fields that are subsequently rendered to other users or administrators, creating a persistent threat vector within the application's user management functionality.
The technical implementation of this vulnerability stems from insufficient sanitization and validation of user inputs within the SUAP V2 update mechanisms. When users attempt to modify their information through the administrative interface, the system fails to properly encode or validate special characters that could be interpreted as executable script code. This weakness aligns with CWE-79 which specifically addresses cross-site scripting vulnerabilities arising from inadequate input validation and output encoding. The vulnerability operates at the application layer where user data flows through the system without proper security controls to prevent malicious script injection.
The operational impact of CVE-2019-7634 extends beyond simple data corruption or display issues, as it creates a persistent threat that can be exploited by attackers to compromise user sessions, steal sensitive information, or manipulate the application's functionality. An attacker could craft malicious payloads that would execute in the context of other users' browsers, potentially allowing for session hijacking, credential theft, or unauthorized access to administrative functions. The vulnerability affects both regular users and administrators who might be tricked into viewing compromised user information, making it particularly dangerous in environments where administrative privileges are involved. This weakness directly maps to ATT&CK technique T1531 which focuses on modifying system images to persist in the environment through malicious code injection.
Mitigation strategies for this vulnerability should focus on implementing comprehensive input validation and output encoding mechanisms throughout the SUAP V2 application. The system must employ proper sanitization of all user inputs before processing or storing them, utilizing established libraries and frameworks designed to prevent XSS attacks. Additionally, implementing Content Security Policy headers and proper HTTP response headers can provide additional layers of protection. Regular security testing including dynamic application security testing and manual code reviews should be conducted to identify similar vulnerabilities in other application components. The remediation process should also include user education regarding the risks of submitting untrusted data and the importance of maintaining updated security protocols within the SUAP V2 environment.