What’s Vulnerable › Vulnerabilities

CVE-2021-42331: ShinHer Information Co., LTD. ShinHer StudyOnline System - Improper Authorization-2

• Severity: medium (CVSS 5.5 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% 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 “Study Edit” function of ShinHer StudyOnline System does not perform permission control. After logging in with user’s privilege, remote attackers can access and edit other users’ tutorial schedule by crafting URL parameters.

Affected products

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

References

• https://www.twcert.org.tw/tw/cp-132-5201-dc534-1.html
• https://www.twcert.org.tw/tw/cp-132-5201-dc534-1.html

Get alerted when CVE-2021-42331 or the next vulnerability affects your stack