Cross-account schedule disclosure and modification via URL parameters
Published Oct 15, 2021 · Updated Sep 17, 2024
Improper authorization in ShinHer StudyOnline System v2021 allows remote authenticated users to view and edit other users’ tutorial schedules. The Study Edit function accepts attacker-controlled URL parameters identifying another user’s schedule without checking whether the logged-in account may access that record. Ordinary user privileges are sufficient, and the documented impact is limited to unauthorized disclosure and modification of tutorial schedule data.
Summary
What happened
Improper authorization in ShinHer StudyOnline System v2021 allows remote authenticated users to view and edit other users’ tutorial schedules. The Study Edit function accepts attacker-controlled URL parameters identifying another user’s schedule without checking whether the logged-in account may access that record. Ordinary user privileges are sufficient, and the documented impact is limited to unauthorized disclosure and modification of tutorial schedule data.
The record
- CVE
- CVE-2021-42331
- Published
- Oct 15, 2021
- Updated
- Sep 17, 2024
- Vendor
- ShinHer Information Co., LTD.
- Product
- ShinHer StudyOnline System
- Classifications
- CWE-862, CWE-285, CAPEC-1, T1565.001, T1213
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 15, 2021CVE publishedPublication date reported by the CVE source.
- Sep 17, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=unspecified <=2021
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo