CVE-2025-27792

Opal vulnerable to CSRF protection bypass

HIGH

7.7

CVSS Score

Published: March 11, 2025 at 09:49 PM UTC

Updated: June 17, 2026 at 09:04 AM UTC

1 product affected across 1 vendorOpal

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Severity

HIGH7.7

Exploit prediction

EPSS 0.3%

SSVC

PoC

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Opal · Obiba

60%

v < 5.1.1

Affected range stops below 5.1.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_CONFIRM

Source: [email protected]

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

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.7HIGHGitHub_M

Vector?

Quick Info

StatusDEFERRED

CWE

CWE-352

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