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Vulnerabilities

Vulnerability · CVE-2017-12161

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.

Published Feb 21, 2018 · catalog updated Jun 17, 2026 · It was found that

Last checked Nov 4, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2017-12161. EPSS is 1.31%. Act only if a listed version of It was found that is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (It was found that).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High8.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.31%
Remediation
Version ranges on file
Affected products
cpe keycloak/keycloak

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe keycloak/keycloak< 3.4.2

How to fix CVE-2017-12161

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2017-12161. EPSS is 1.31%. Act only if a listed version of It was found that is installed.

Which versions are affected?

Compare what you have installed with < 3.4.2. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-602; CWE-640: Weak Password Recovery Mechanism for Forgotten Password. EPSS 1.31%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Keycloak security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Feb 21, 2018 · Monitored products — high

    Detected

    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.

  2. Jun 17, 2026 · Monitored products — high

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2017-12161

    Official CVE identifier

    cve.org
  • Monitored products — highVendor advisoryCVE-2017-12161

    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.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 3, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgNov 4, 2026
  • Monitored products — highNov 3, 2026