CVE-2025-27101: Broken Access Control in Opal filesystem's copy functionality exposes all user data
First published: Tue Mar 11 2025(Updated: )
Opal is OBiBa’s core database application for biobanks or epidemiological studies. Prior to version 5.1.1, when copying any parent directory to a folder in the /temp/ directory, all files in that parent directory are copied, including files which the user should not have access to. All users of the application are impacted, as this is exploitable by any user to reveal all files in the opal filesystem. This also means that low-privilege users such as DataShield users can retrieve the files of other users. Version 5.1.1 contains a patch for the issue.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| OBiBa Opal | <5.1.1 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2025-27101?
CVE-2025-27101 is categorized as a high severity vulnerability due to unauthorized access to sensitive files.
How do I fix CVE-2025-27101?
To fix CVE-2025-27101, upgrade to Opal version 5.1.1 or later where the vulnerability has been addressed.
What type of vulnerability is CVE-2025-27101?
CVE-2025-27101 is an access control vulnerability that allows unauthorized file access when copying directories.
Which software is affected by CVE-2025-27101?
CVE-2025-27101 affects OBiBa Opal versions prior to 5.1.1.
What is the impact of CVE-2025-27101?
The impact of CVE-2025-27101 is that it may expose sensitive files to users who should not have access, potentially leading to data breaches.
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