CVE-2026-30707 is a broken access control vulnerability discovered in the SpeedExam Online Examination System (SaaS) versions after FEV2026. The vulnerability resides in the ReviewAnswerDetails ASP.NET PageMethod, which is intended to be restricted by client-side controls. However, authenticated attackers can bypass these client-side restrictions and invoke this method directly on the server. This direct invocation allows attackers to retrieve the full answer key for exams, exposing sensitive examination content. The vulnerability arises because the server-side implementation fails to enforce proper authorization checks, relying instead on client-side controls that can be circumvented. Since the attacker must be authenticated, the threat actor could be a legitimate user with limited privileges or a compromised account. The lack of a CVSS score indicates that the vulnerability is newly published, with no known exploits in the wild as of the publication date (March 17, 2026). The absence of patch links suggests that a fix has not yet been released or publicly disclosed. This vulnerability undermines the confidentiality and integrity of exam data, potentially allowing cheating or unauthorized disclosure of exam content. The attack vector is straightforward for authenticated users, requiring no additional user interaction beyond authentication. The vulnerability highlights the critical importance of enforcing server-side authorization checks rather than relying on client-side controls in web applications, especially those handling sensitive data such as examination answers.

The primary impact of CVE-2026-30707 is the unauthorized disclosure of exam answer keys, which compromises the confidentiality and integrity of examination data. This can lead to widespread cheating, loss of trust in the examination system, and reputational damage to educational institutions or certification bodies using SpeedExam. Organizations may face legal and compliance risks if exam integrity is compromised. The vulnerability could also disrupt the availability of the service if exploited at scale or combined with other attacks. Since the flaw requires authentication, insider threats or compromised user accounts pose a significant risk. The impact extends globally to any organization using SpeedExam or similar SaaS platforms for online assessments, particularly in sectors such as education, professional certification, and corporate training. The breach of exam content could undermine the validity of certifications and assessments, affecting workforce qualifications and academic outcomes.

To mitigate CVE-2026-30707, organizations should immediately review and strengthen server-side access controls for all sensitive methods, including ReviewAnswerDetails. Specifically, implement robust authorization checks on the server to verify that the authenticated user has explicit permission to access exam answer keys before processing any requests. Avoid relying solely on client-side restrictions, which can be bypassed. Conduct thorough code audits to identify and remediate similar broken access control issues in the application. Monitor authentication logs for suspicious activity, such as unusual access patterns to the ReviewAnswerDetails method. If possible, restrict access to the method to only highly privileged users or administrative roles. Coordinate with SpeedExam vendors or developers to obtain patches or updates addressing this vulnerability. Additionally, consider implementing multi-factor authentication to reduce the risk of compromised accounts. Educate users about the importance of account security and monitor for potential insider threats. Finally, prepare incident response plans to quickly address any exploitation attempts.