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CVE-2025-27101— Broken Access Control in Opal filesystem's copy functionality exposes all user data

Quick assessment

Affected
obiba opal
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Opal是Open Source Software for Epidemiology开源的一个用于生物库或流行病学研究的核心数据库应用程序。 Opal 5.1.1之前版本存在路径遍历漏洞，该漏洞源于复制父目录时可能泄露用户无权访问的文件。

AI Predicted 8.2 Difficulty: Easy EPSS 0.56% · P44

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2025-27101

Vulnerability Information
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Vulnerability Title
Broken Access Control in Opal filesystem's copy functionality exposes all user data
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Opal 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Opal是Open Source Software for Epidemiology开源的一个用于生物库或流行病学研究的核心数据库应用程序。 Opal 5.1.1之前版本存在路径遍历漏洞，该漏洞源于复制父目录时可能泄露用户无权访问的文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
obiba opal < 5.1.1 -

II. Public POCs for CVE-2025-27101

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III. Intelligence Information for CVE-2025-27101

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Patches & Fixes for CVE-2025-27101 (1)

Vendor Advisories for CVE-2025-27101 (1)

IV. Related Vulnerabilities

Same product: opal
Same vendor: obiba
Same weakness: CWE-22

V. Comments for CVE-2025-27101

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