CVE-2021-42329 : Exploit Details and Defense Strategies
Learn about CVE-2021-42329 affecting ShinHer StudyOnline System. Find details on the stored XSS vulnerability, impact, affected versions, and mitigation steps to protect your system.
ShinHer Information Co., LTD. ShinHer StudyOnline System - Stored XSS vulnerability affecting versions up to 2021.
Understanding CVE-2021-42329
ShinHer StudyOnline System's message board is susceptible to stored XSS attacks due to improper input filtering.
What is CVE-2021-42329?
The vulnerability arises from a flaw in the "List_Add" function of the message board, allowing remote attackers to execute malicious JavaScript via the title parameter.
The Impact of CVE-2021-42329
- CVSS Base Score: 5.4 (Medium)
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: Low
- User Interaction: Required
- Scope: Changed
- Confidentiality and Integrity Impact: Low
- Availability Impact: None
Technical Details of CVE-2021-42329
ShinHer StudyOnline System is at risk due to a stored XSS weakness.
Vulnerability Description
The vulnerability enables attackers to perform stored XSS attacks by injecting malicious JavaScript code into the title parameter of the message board.
Affected Systems and Versions
- Product: ShinHer StudyOnline System
- Vendor: ShinHer Information Co., LTD.
- Versions Affected: <= 2021
Exploitation Mechanism
Remote threat actors can exploit the vulnerability post user authentication to inject and execute JavaScript for stored XSS.
Mitigation and Prevention
Immediate actions and preventative measures for mitigating the vulnerability.
Immediate Steps to Take
- Apply the provided solution: Update to ShinHer StudyOnline System version v2021.08.20.01
Long-Term Security Practices
- Implement input validation to filter out special characters and prevent XSS attacks
- Train users on identifying and avoiding social engineering attacks
Patching and Updates
Regularly apply security patches and updates to safeguard against known vulnerabilities.