What’s Vulnerable › Vulnerabilities

CVE-2025-61782: Open Redirect in OpenCTI's SAML Authentication Flow

• Severity: medium (CVSS 6.1 v3.1)
• 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: 2026-01-07 · updated 2026-10-12
• Weakness: CWE-601

Description

OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to version 6.8.3, an open redirect vulnerability exists in the OpenCTI platform's SAML authentication endpoint (/auth/saml/callback). By manipulating the RelayState parameter, an attacker can force the server to issue a 302 redirect to any external URL, enabling phishing, credential theft, and arbitrary site redirection. This issue has been patched in version 6.8.3.

Affected products

• OpenCTI-Platform opencti: before 6.8.3 — fixed in 6.8.3

How to fix

Upgrade to a fixed version: OpenCTI-Platform opencti 6.8.3. Check the vendor advisory for mitigations.

References

• https://github.com/OpenCTI-Platform/opencti/commit/f755165a26888925c4a58018f7238ff92a0bd378
• https://github.com/OpenCTI-Platform/opencti/releases/tag/6.8.3
• https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-jc3f-c62g-v7qw

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