CVE-2025-67494: ZITADEL Vulnerable to Unauthenticated Full-Read SSRF via V2 Login

Severity: high (CVSS 8.6 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-12-09 · updated 2026-10-14
Weakness: CWE-918

Description

ZITADEL is an open-source identity infrastructure tool. Versions 4.7.0 and below are vulnerable to an unauthenticated, full-read SSRF vulnerability. The ZITADEL Login UI (V2) treats the x-zitadel-forward-host header as a trusted fallback for all deployments, including self-hosted instances. This allows an unauthenticated attacker to force the server to make HTTP requests to arbitrary domains, such as internal addresses, and read the responses, enabling data exfiltration and bypassing network-segmentation controls. This issue is fixed in version 4.7.1.

Affected products

zitadel: from 4.0.0 before 4.7.1 — fixed in 4.7.1

How to fix

Upgrade to a fixed version: zitadel 4.7.1. Check the vendor advisory for mitigations.

References

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