What’s Vulnerable › Vulnerabilities

CVE-2017-12161

• Severity: high (CVSS 8.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-02-21 · updated 2026-06-17
• Weakness: CWE-602

Description

It was found that keycloak before 3.4.2 final would permit misuse of a client-side /etc/hosts entry to spoof a URL in a password reset request. An attacker could use this flaw to craft a malicious password reset request and gain a valid reset token, leading to information disclosure or further attacks.

Affected products

• Keycloak: before 3.4.2 — fixed in 3.4.2

How to fix

Upgrade to a fixed version: Keycloak 3.4.2. Check the vendor advisory for mitigations.

References

• https://bugzilla.redhat.com/show_bug.cgi?id=1484564
• https://github.com/keycloak/keycloak-documentation/pull/268/commits/a2b58aadee42af2c375b72e86dffc2cf23cc3770
• https://bugzilla.redhat.com/show_bug.cgi?id=1484564
• https://github.com/keycloak/keycloak-documentation/pull/268/commits/a2b58aadee42af2c375b72e86dffc2cf23cc3770

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