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.
{
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/27xxx/CVE-2025-27792.json",
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-352"
]
}