CVE-2021-42330 : What You Need to Know

ShinHer StudyOnline System by ShinHer Information Co., LTD. is affected by an improper authorization vulnerability, allowing remote attackers to access and edit others' information.

Understanding CVE-2021-42330

The vulnerability in ShinHer StudyOnline System enables unauthorized access and editing of user data, posing a significant risk to confidentiality and integrity.

What is CVE-2021-42330?

The "Teacher Edit" feature of ShinHer StudyOnline System lacks proper authority control. Attackers can manipulate URL parameters to breach user privileges and modify personal data.

The Impact of CVE-2021-42330

This vulnerability has a CVSS base score of 8.8 (High severity) due to its potential to compromise confidentiality, integrity, and availability. It requires low privileges and no user interaction, making it exploitable over a network.

Technical Details of CVE-2021-42330

ShinHer StudyOnline System's vulnerability requires immediate attention to prevent unauthorized data access and manipulation.

Vulnerability Description

The flaw allows attackers to access and edit users' credential and personal information through crafted URL parameters, exploiting the lack of authority control.

Affected Systems and Versions

Product: ShinHer StudyOnline System
Vendor: ShinHer Information Co., LTD.
Versions Affected: Up to 2021 (unspecified)

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating URL parameters after logging in with a user's privilege, enabling unauthorized access and modification of personal data.

Mitigation and Prevention

Addressing CVE-2021-42330 requires immediate actions and long-term security practices to safeguard user data.

Immediate Steps to Take

Update ShinHer StudyOnline System to version v2021.08.20.01 to patch the vulnerability.

Long-Term Security Practices

Implement strict authorization controls to prevent unauthorized access.
Regularly monitor and audit user activities to detect suspicious behavior.

Patching and Updates

Apply security patches and updates promptly to mitigate vulnerabilities and enhance system security.