CVE-2021-42331

Name: CVE-2021-42331
Creator: NVD / NIST
Published: 2021-10-15T12:15:07.707+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.62%

Last modified Jun 17, 2026

CVE-2021-42331 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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.. EPSS estimates a 0.62% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

EPSS Probability

0.62%

45.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Xinheinformation	Xinhe Teaching Platform System	v2021

References

https://www.twcert.org.tw/tw/cp-132-5201-dc534-1.htmlThird Party Advisory
https://www.twcert.org.tw/tw/cp-132-5201-dc534-1.htmlThird Party Advisory

Timeline

Published: Oct 15, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-42331?

How severe is CVE-2021-42331?

CVE-2021-42331 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.62% probability of exploitation in the next 30 days.

How do I fix CVE-2021-42331?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-42331?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST