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CVE-2020-1724

Keycloak Insufficient Session Expiry

4.3 MediumFix available

A flaw was found in Keycloak in versions before 9.0.2. This flaw allows a malicious user that is currently logged in, to see the personal information of a previously logged out user in the account manager section.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
Low
Integrity
None
Availability
None

Exploit likelihood

0.82%Up 0.4 points since Apr 14, 2021
90%50%10%1%

What each source reports

CVE List Score used 4.3

A flaw was found in Keycloak in versions before 9.0.2. This flaw allows a malicious user that is currently logged in, to see the personal information of a previously logged out user in the account manager section.

Record
CVE-2020-1724
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-613
Updated
2026-11-02
EUVDEUVD-2022-3258 4.3

A flaw was found in Keycloak in versions before 9.0.2. This flaw allows a malicious user that is currently logged in, to see the personal information of a previously logged out user in the account manager section.

Record
EUVD-2022-3258
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Updated
2026-11-03
GitHub AdvisoriesGHSA-8xj2-47xw-q78c 4.3

Keycloak Insufficient Session Expiry

A flaw was found in Keycloak in versions before 9.0.2. This flaw allows a malicious user that is currently logged in, to see the personal information of a previously logged out user in the account manager section.

Record
GHSA-8xj2-47xw-q78c
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-613
Updated
2026-11-02
NVD 4.3

A flaw was found in Keycloak in versions before 9.0.2. This flaw allows a malicious user that is currently logged in, to see the personal information of a previously logged out user in the account manager section.

Record
CVE-2020-1724
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CVSS 2.0
4.0 MediumAV:N/AC:L/Au:S/C:P/I:N/A:N
Weakness
CWE-613
Updated
2026-11-02
OSV 4.3

A flaw was found in Keycloak in versions before 9.0.2. This flaw allows a malicious user that is currently logged in, to see the personal information of a previously logged out user in the account manager section.

Record
CVE-2020-1724
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Updated
2026-11-02
OSVGHSA-8xj2-47xw-q78c 4.3

Keycloak Insufficient Session Expiry

A flaw was found in Keycloak in versions before 9.0.2. This flaw allows a malicious user that is currently logged in, to see the personal information of a previously logged out user in the account manager section.

Record
GHSA-8xj2-47xw-q78c
CVSS 3.1
4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-613
Updated
2026-11-02
OSVRHSA-2020:2106 8.8

Red Hat Security Advisory: Red Hat Single Sign-On 7.3.8 security update on RHEL 6

Record
RHSA-2020:2106
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2020:2107 8.8

Red Hat Security Advisory: Red Hat Single Sign-On 7.3.8 security update on RHEL 7

Record
RHSA-2020:2107
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2020:2108 8.8

Red Hat Security Advisory: Red Hat Single Sign-On 7.3.8 security update on RHEL 8

Record
RHSA-2020:2108
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
org.keycloak:keycloak-core
Maven
 before 9.0.2
9.0.2
org.keycloak:keycloak-core
Maven
 before 9.0.2, plus listed versions
1.0-alpha-11.0-alpha-1-120620131.0-alpha-21.0-alpha-31.0-alpha-4
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1.0-beta-11.0-beta-1-201505211.0-beta-1-201505231.0-beta-21.0-beta-31.0-beta-41.0-final1.0-rc-11.0-rc-21.0.1.Final1.0.2.Final1.0.3.Final1.0.4.Final1.0.5.Final1.1.0.Beta11.1.0.Beta21.1.0.Final1.1.1.Final1.2.0.Beta11.2.0.CR11.2.0.Final1.3.0.Final1.3.1.Final1.4.0.Final1.5.0-Final1.5.0.Final1.5.1.Final1.6.0.Final1.6.1.Final1.7.0.CR11.7.0.Final1.8.0.Alpha11.8.0.CR11.8.0.CR21.8.0.CR31.8.0.Final1.8.1.Final1.9.0.CR11.9.0.Final1.9.1.Final1.9.2.Final1.9.3.Final1.9.4.Final1.9.5.Final1.9.7.Final
9.0.2
rh-sso7-keycloak
Red Hat:red_hat_single_sign_on:7::el6
From an advisory covering 3 CVEs
 before 0:4.8.20-1.Final_redhat_00001.1.el6sso
0:4.8.20-1.Final_redhat_00001.1.el6sso
rh-sso7-keycloak-server
Red Hat:red_hat_single_sign_on:7::el6
From an advisory covering 3 CVEs
 before 0:4.8.20-1.Final_redhat_00001.1.el6sso
0:4.8.20-1.Final_redhat_00001.1.el6sso
rh-sso7-keycloak
Red Hat:red_hat_single_sign_on:7::el7
From an advisory covering 3 CVEs
 before 0:4.8.20-1.Final_redhat_00001.1.el7sso
0:4.8.20-1.Final_redhat_00001.1.el7sso
rh-sso7-keycloak-server
Red Hat:red_hat_single_sign_on:7::el7
From an advisory covering 3 CVEs
 before 0:4.8.20-1.Final_redhat_00001.1.el7sso
0:4.8.20-1.Final_redhat_00001.1.el7sso
rh-sso7-keycloak
Red Hat:red_hat_single_sign_on:7::el8
From an advisory covering 3 CVEs
 before 0:4.8.20-1.Final_redhat_00001.1.el8sso
0:4.8.20-1.Final_redhat_00001.1.el8sso
rh-sso7-keycloak-server
Red Hat:red_hat_single_sign_on:7::el8
From an advisory covering 3 CVEs
 before 0:4.8.20-1.Final_redhat_00001.1.el8sso
0:4.8.20-1.Final_redhat_00001.1.el8sso

History

History
RecordedChangedSources
affected, facts
aliases, productsEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-1724 is a medium vulnerability (CVSS 4.3) in Keycloak, published May 11, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.82%, the 57th percentile. Fixed in org.keycloak:keycloak-core 9.0.2.

References

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Left out here: 58 versions. The JSON record has them.

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