CVE-2026-30707: SpeedExam Auth Bypass Vulnerability

CVE-2026-30707 Overview

CVE-2026-30707 is a Broken Access Control vulnerability discovered in SpeedExam Online Examination System (SaaS) affecting versions after v.FEV2026. The vulnerability exists in the ReviewAnswerDetails ASP.NET PageMethod, allowing authenticated attackers to bypass client-side restrictions and invoke the method directly to retrieve the full answer key for examinations.

This vulnerability represents a significant security flaw in educational testing software, as it enables unauthorized access to sensitive examination data that could compromise the integrity of assessment processes.

Critical Impact

Authenticated attackers can exploit this Broken Access Control vulnerability to retrieve complete answer keys from the SpeedExam Online Examination System, potentially compromising examination integrity and enabling academic fraud at scale.

Affected Products

• SpeedExam Online Examination System (SaaS) versions after v.FEV2026

Discovery Timeline

• 2026-03-17 - CVE-2026-30707 published to NVD
• 2026-03-18 - Last updated in NVD database

Technical Details for CVE-2026-30707

Vulnerability Analysis

This vulnerability is classified under CWE-284 (Improper Access Control), which occurs when software fails to properly restrict access to resources from unauthorized actors. In the case of CVE-2026-30707, the SpeedExam Online Examination System implements access restrictions on the client-side rather than enforcing proper server-side authorization checks.

The ReviewAnswerDetails ASP.NET PageMethod is designed to retrieve answer information for examinations, but it lacks adequate server-side validation to verify whether the requesting user has legitimate permissions to access the full answer key data. This architectural weakness allows any authenticated user to bypass the intended restrictions.

The attack requires network access and an authenticated session with the SpeedExam platform. Once authenticated, an attacker can craft direct requests to the vulnerable PageMethod, completely circumventing the client-side access controls that were intended to protect sensitive examination data.

Root Cause

The root cause of this vulnerability is the reliance on client-side access controls without corresponding server-side enforcement. The ReviewAnswerDetails PageMethod accepts requests from any authenticated user without validating whether that user should have access to the requested answer key data. This violates the principle of defense in depth and the fundamental security requirement that all access control decisions must be enforced on the server.

Attack Vector

The attack exploits the network-accessible ASP.NET PageMethod endpoint. An attacker with valid authentication credentials to the SpeedExam platform can directly invoke the ReviewAnswerDetails method by crafting HTTP requests that bypass the client-side interface. Since the server does not perform adequate authorization checks, the request is processed and the full answer key is returned to the attacker.

The attack flow involves:

1. Authenticating to the SpeedExam platform with any valid user account
2. Identifying the ReviewAnswerDetails PageMethod endpoint
3. Crafting direct HTTP requests to the PageMethod
4. Receiving the complete answer key data in the response

For technical details on the exploitation method, refer to the GitHub CVE-2026-30707 Report and GitHub SpeedExam Security Report.

Detection Methods for CVE-2026-30707

Indicators of Compromise

• Unusual or high-volume requests to the ReviewAnswerDetails PageMethod endpoint from user accounts that should not require access to answer keys
• HTTP requests directly targeting ASP.NET PageMethod endpoints that bypass normal application navigation patterns
• Access logs showing answer key retrieval by users who are not examination administrators or content creators
• Pattern of requests accessing multiple examination answer keys in rapid succession

Detection Strategies

• Implement logging and monitoring for all calls to the ReviewAnswerDetails PageMethod, capturing user identity and requested resources
• Deploy web application firewall (WAF) rules to detect and alert on direct PageMethod invocations that do not follow expected user workflows
• Establish baseline patterns for legitimate answer key access and alert on deviations
• Monitor for authenticated sessions that make unusual API calls inconsistent with their assigned user role

Monitoring Recommendations

• Enable detailed application-level logging for all PageMethod endpoints in the SpeedExam application
• Configure SIEM rules to correlate answer key access events with user role assignments to detect unauthorized access attempts
• Implement real-time alerting for any access to examination answer data by non-administrative users
• Conduct periodic access log reviews to identify potential exploitation patterns

How to Mitigate CVE-2026-30707

Immediate Actions Required

• Restrict access to the ReviewAnswerDetails PageMethod at the network level until a proper fix can be implemented
• Review user access logs to identify any potential exploitation of this vulnerability
• Implement server-side authorization checks to validate user permissions before returning answer key data
• Consider temporarily disabling the affected PageMethod functionality if examination integrity is critical

Patch Information

Organizations using SpeedExam Online Examination System should contact the vendor directly for patch availability. Monitor the vendor's security advisories and official communication channels for updates regarding CVE-2026-30707. Additional information can be found in the GitHub CVE-2026-30707 Report.

Workarounds

• Implement network-level access controls (firewall rules, WAF policies) to restrict access to the ReviewAnswerDetails endpoint to only authorized administrative IP addresses
• Deploy an application-layer proxy that enforces additional authorization checks before forwarding requests to the vulnerable endpoint
• If possible, disable the ReviewAnswerDetails PageMethod until server-side authorization can be properly implemented
• Implement additional monitoring and alerting to detect exploitation attempts while awaiting an official patch

# Example: Web server configuration to restrict access to the vulnerable endpoint
# Add to your web server configuration (IIS, nginx reverse proxy, or WAF rules)
# Restrict ReviewAnswerDetails endpoint to admin IP ranges only

# For IIS - add to web.config in the application root
# <location path="ReviewAnswerDetails.aspx">
#   <system.webServer>
#     <security>
#       <ipSecurity allowUnlisted="false">
#         <add allowed="true" ipAddress="10.0.0.0" subnetMask="255.255.255.0"/>
#       </ipSecurity>
#     </security>
#   </system.webServer>
# </location>