CVE-2020-1717Network attack vector

Authenticated account email enumeration

Published Feb 11, 2021 · Updated Aug 4, 2024

Information exposure in Keycloak 7.0.1 allows remote authenticated users to enumerate account email addresses via unspecified vectors. Red Hat has not published the affected request handler or the response difference that reveals whether an email belongs to an account. A valid Keycloak session is required, and the bounded consequence is disclosure of registered email addresses.

CVSS severity2.7
Low
EPSS probability0.77%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information exposure in Keycloak 7.0.1 allows remote authenticated users to enumerate account email addresses via unspecified vectors. Red Hat has not published the affected request handler or the response difference that reveals whether an email belongs to an account. A valid Keycloak session is required, and the bounded consequence is disclosure of registered email addresses.

The record

CVE
CVE-2020-1717
Published
Feb 11, 2021
Updated
Aug 4, 2024
Vendor
Red Hat
Product
Red Hat build of Keycloak
Classifications
CWE-209, T1087
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 11, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=keycloak 7.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Red Hat · Red Hat build of Keycloakversion=keycloak 7.0.1

Published CVSS scores

4.0NIST NVDAV:N/AC:L/Au:S/C:P/I:N/A:N
2.7NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-209Generation of Error Message Containing Sensitive Information
T1087Account Discovery

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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