CVE-2025-32808 in InQuizitive
Summary
by MITRE • 04/11/2025
W. W. Norton InQuizitive through 2025-04-08 allows students to insert arbitrary records of their quiz performance into the backend, because only client-side access control exists.
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Analysis
by VulDB Data Team • 10/30/2025
The vulnerability identified as CVE-2025-32808 affects W. W. Norton's InQuizitive platform, specifically targeting the quiz performance recording functionality through April 8, 2025. This represents a critical security flaw where the system fails to implement proper server-side validation mechanisms, instead relying entirely on client-side access controls to govern data insertion operations. The fundamental issue lies in the absence of backend verification processes that would normally validate the authenticity and legitimacy of quiz performance records before accepting them into the database. This architectural weakness creates a scenario where any authenticated user can manipulate the data insertion process by directly modifying client-side code or sending crafted requests to the backend API endpoints.
The technical implementation of this vulnerability stems from a classic lack of input validation and access control enforcement at the server level. Client-side controls typically involve JavaScript checks, form validations, or UI restrictions that can be easily bypassed by malicious actors who understand the underlying API endpoints and data structures. When only client-side validation exists, attackers can circumvent these protections by directly interacting with the backend services through tools like curl, Postman, or custom scripts, thereby inserting arbitrary quiz records without proper authorization or data integrity checks. This flaw directly maps to CWE-602 Client-Side Enforcement of Server-Side Security, which specifically addresses the dangerous practice of relying solely on client-side controls for security enforcement.
The operational impact of this vulnerability extends beyond simple data manipulation, potentially compromising the integrity of academic assessment systems and undermining the credibility of student performance metrics. Students could artificially inflate their quiz scores, manipulate grade records, or insert false performance data that would be permanently stored in the system's database. This creates significant challenges for educators who rely on accurate assessment data for instructional decision-making, grade reporting, and student progress tracking. The vulnerability also opens potential pathways for more sophisticated attacks where malicious actors might attempt to insert malicious payloads or exploit the system to gain further access to sensitive educational data. From a compliance perspective, this vulnerability could violate educational data protection regulations and institutional policies regarding data integrity and academic honesty.
Mitigation strategies for CVE-2025-32808 must focus on implementing robust server-side validation and access control mechanisms. Organizations should enforce proper authentication and authorization checks at every API endpoint that accepts quiz performance data, ensuring that only legitimate users can submit records for their own assessments. The system should implement comprehensive input sanitization, validate all submitted data against expected formats and ranges, and maintain audit trails of all data insertion activities. Additionally, implementing rate limiting and anomaly detection mechanisms can help identify and prevent unusual submission patterns that might indicate malicious activity. The solution aligns with ATT&CK technique T1566.001 for credential access and T1496 for resource hijacking, as attackers could exploit this vulnerability to manipulate system resources and potentially gain unauthorized access to educational data. Organizations should also consider implementing proper logging and monitoring of all data modification activities to detect and respond to unauthorized access attempts. Regular security testing and code reviews should be conducted to identify similar vulnerabilities in other components of the platform, ensuring that client-side controls are never relied upon exclusively for security enforcement.