CSRF in Obiba Opal

CVE-2025-27792

Opal is OBiBa’s core database application for biobanks or epidemiological studies. Prior to version 5.1.1, the protections against cross-site request forgery (CSRF) were insufficient application-wide. The referrer header is checked, and if it is invalid, the server returns 403. However, the referrer header can be dropped from CSRF requests using `<meta name="referrer" content="never">`, effectively bypassing this protection. Version 5.1.1 contains a patch for the issue.

Vulnerability class: CSRF (Cross-Site Request Forgery)

EPSS: 0.003 (18.8th percentile) — read the EPSS interpretation.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-27792?
CVE-2025-27792 is a vulnerability in Obiba Opal, classified under Cross-Site Request Forgery (CSRF). Published 2025-03-11.
Is CVE-2025-27792 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.