What’s Vulnerable › Vulnerabilities

CVE-2021-42330: ShinHer Information Co., LTD. ShinHer StudyOnline System - Improper Authorization-1

• Severity: medium (CVSS 5.5 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-10-15 · updated 2026-06-17
• Weakness: CWE-285

Description

The “Teacher Edit” function of ShinHer StudyOnline System does not perform authority control. After logging in with user’s privilege, remote attackers can access and edit other users’ credential and personal information by crafting URL parameters.

Affected products

• ShinHer Information Co., LTD. ShinHer StudyOnline System: v2021

References

• https://www.twcert.org.tw/tw/cp-132-5200-3d3ca-1.html
• https://www.twcert.org.tw/tw/cp-132-5200-3d3ca-1.html

Get alerted when CVE-2021-42330 or the next vulnerability affects your stack