CVE-2025-61782 OpenCTI-Platform CVE debrief

Who should care

Defenders responsible for OpenCTI instances, security teams, and users of the OpenCTI platform should be aware of this vulnerability and take steps to mitigate it. This includes prioritizing patching to prevent phishing attacks, credential theft, and arbitrary site redirection. Defenders should review compensating controls for exposed systems while remediation is scheduled and verified.

Why it matters

CVE-2025-61782 is an open redirect vulnerability in OpenCTI's SAML authentication endpoint. Defenders should prioritize patching to prevent phishing attacks. The vulnerability allows attackers to redirect users to external URLs.

• Phishing attacks may be facilitated through open redirect
• Credential theft is a potential risk
• Arbitrary site redirection could occur

Technical summary

The OpenCTI platform's SAML authentication endpoint (/auth/saml/callback) is vulnerable to an open redirect attack. By manipulating the RelayState parameter, an attacker can force the server to issue a 302 redirect to any external URL. This could be used to facilitate phishing attacks, credential theft, and arbitrary site redirection. The vulnerability has been patched in version 6.8.3. Defenders should prioritize patching OpenCTI instances to prevent potential phishing attacks. The vulnerability allows attackers to redirect users to external URLs.

Defensive priority

Defenders should prioritize patching OpenCTI instances to prevent potential phishing attacks.

Recommended defensive actions

• Patch OpenCTI instances to version 6.8.3 or later
• Monitor for suspicious redirects
• Educate users on phishing risks
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The vulnerability is described in the CVE record and NVD entry. The OpenCTI platform's SAML authentication endpoint is vulnerable to open redirect attacks, which could be used for phishing. The CVE record was published on 2026-01-07T18:15:51.223Z and has not been modified since then. The NVD entry provides additional details on the vulnerability. The OpenCTI platform's SAML authentication endpoint (/auth/saml/callback) is vulnerable to an open redirect attack.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.