What’s Vulnerable › Vulnerabilities

CVE-2025-27792: Opal vulnerable to CSRF protection bypass

• Severity: high (CVSS 7.7 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% 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-352

Description

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.

Affected products

• obiba opal: before 5.1.1

References

• https://github.com/obiba/opal/security/advisories/GHSA-27vw-29rq-c358
• https://github.com/obiba/opal/security/advisories/GHSA-27vw-29rq-c358

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