CVE-2020-1724Network attack vector

Cross-user data disclosure after logout

Published May 11, 2020 · Updated Aug 4, 2024

Information disclosure in Red Hat build of Keycloak before 9.0.2 allows remote authenticated users to view a logged-out user's personal data. The account manager can retain and display personal information belonging to a previously logged-out user; Red Hat has not disclosed the underlying session-state error. Exploitation requires a valid logged-in account and exposes another user's account-manager data without reported modification or service interruption.

CVSS severity4.3
Medium
EPSS probability0.82%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Red Hat build of Keycloak before 9.0.2 allows remote authenticated users to view a logged-out user's personal data. The account manager can retain and display personal information belonging to a previously logged-out user; Red Hat has not disclosed the underlying session-state error. Exploitation requires a valid logged-in account and exposes another user's account-manager data without reported modification or service interruption.

The record

CVE
CVE-2020-1724
Published
May 11, 2020
Updated
Aug 4, 2024
Vendor
Red Hat
Product
Red Hat build of Keycloak
Classifications
CWE-613, T1087
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 11, 2020CVE 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=All versions before 9.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Red Hat · Red Hat build of Keycloakversion=All versions before 9.0.2

Published CVSS scores

4.0NISTAV:N/AC:L/Au:S/C:P/I:N/A:N
4.3Red Hat, Inc.CVSS:3.1/AV:N/AC:L/PR:L/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-613Insufficient Session Expiration
T1087Account Discovery

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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