CVE-2025-27792

HIGH

Opal < 5.1.1 - Cross-Site Request Forgery via Referrer Header Bypass

Title source: llm
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v4 7.7
EPSS 0.0027
EPSS Percentile 18.3%
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact partial

Details

CWE
CWE-352
Status published
Products (1)
obiba/opal < 5.1.1
Published Mar 11, 2025
Tracked Since Feb 18, 2026