What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.3 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-03-11 · updated 2026-06-17
• Weakness: CWE-22

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.

Affected products

• obiba opal: before 5.1.1

References

• https://github.com/obiba/opal/commit/fca7dc9c8348064741b2e8b2c31b66660a935743
• https://github.com/obiba/opal/security/advisories/GHSA-rxmx-gqjj-vhv8
• https://github.com/obiba/opal/security/advisories/GHSA-rxmx-gqjj-vhv8

Get alerted when CVE-2025-27101 or the next vulnerability affects your stack