Cross-account data access via unchecked URL parameters
Published Oct 15, 2021 · Updated Sep 16, 2024
Improper authorization in ShinHer StudyOnline System 2021 and earlier allows remote authenticated users to read and edit other users’ account data. The Teacher Edit function trusts URL parameters that select the target account without enforcing authorization for that account. A valid low-privilege login is required; exploitation exposes and alters other users’ credentials and personal information.
Summary
What happened
Improper authorization in ShinHer StudyOnline System 2021 and earlier allows remote authenticated users to read and edit other users’ account data. The Teacher Edit function trusts URL parameters that select the target account without enforcing authorization for that account. A valid low-privilege login is required; exploitation exposes and alters other users’ credentials and personal information.
The record
- CVE
- CVE-2021-42330
- Published
- Oct 15, 2021
- Updated
- Sep 16, 2024
- Vendor
- ShinHer Information Co., LTD.
- Product
- ShinHer StudyOnline System
- Classifications
- CWE-285, T1098
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 15, 2021CVE publishedPublication date reported by the CVE source.
- Sep 16, 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?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
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.
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