Every CVE Search/ Get API key

CVE-2022-4137

Keycloak: reflected xss attack

8.1 HighPublic exploitFix available

A reflected cross-site scripting (XSS) vulnerability was found in the 'oob' OAuth endpoint due to incorrect null-byte handling. This issue allows a malicious link to insert an arbitrary URI into a Keycloak error page. This flaw requires a user or administrator to interact with a link in order to be vulnerable. This may compromise user details, allowing it to be changed or collected by an attacker.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
None

Exploit likelihood

1.19%Up 1.1 points since Sep 26, 2023
90%50%10%1%

What each source reports

CVE List Score used 8.1

Keycloak: reflected xss attack

A reflected cross-site scripting (XSS) vulnerability was found in the 'oob' OAuth endpoint due to incorrect null-byte handling. This issue allows a malicious link to insert an arbitrary URI into a Keycloak error page. This flaw requires a user or administrator to interact with a link in order to be vulnerable. This may compromise user details, allowing it to be changed or collected by an attacker.

Record
CVE-2022-4137
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Weakness
CWE-81
Updated
2026-11-02
EUVDEUVD-2023-0968 8.1

A reflected cross-site scripting (XSS) vulnerability was found in the 'oob' OAuth endpoint due to incorrect null-byte handling. This issue allows a malicious link to insert an arbitrary URI into a Keycloak error page. This flaw requires a user or administrator to interact with a link in order to be vulnerable. This may compromise user details, allowing it to be changed or collected by an attacker.

Record
EUVD-2023-0968
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Updated
2026-11-03
GitHub AdvisoriesGHSA-9hhc-pj4w-w5rv 8.1

Keycloak Cross-site Scripting on OpenID connect login service

A reflected cross-site scripting (XSS) vulnerability was found in the oob OAuth endpoint due to incorrect null-byte handling. This issue allows a malicious link to insert an arbitrary URI into a Keycloak error page.

Record
GHSA-9hhc-pj4w-w5rv
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Weakness
CWE-79, CWE-116
Updated
2026-11-02
NVD 8.1

A reflected cross-site scripting (XSS) vulnerability was found in the 'oob' OAuth endpoint due to incorrect null-byte handling. This issue allows a malicious link to insert an arbitrary URI into a Keycloak error page. This flaw requires a user or administrator to interact with a link in order to be vulnerable. This may compromise user details, allowing it to be changed or collected by an attacker.

Record
CVE-2022-4137
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness
CWE-81, CWE-79
Updated
2026-11-02
OSVGHSA-9hhc-pj4w-w5rv 8.1

Keycloak Cross-site Scripting on OpenID connect login service

A reflected cross-site scripting (XSS) vulnerability was found in the oob OAuth endpoint due to incorrect null-byte handling. This issue allows a malicious link to insert an arbitrary URI into a Keycloak error page.

Record
GHSA-9hhc-pj4w-w5rv
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Weakness
CWE-116, CWE-79
Updated
2026-11-02
OSVRHSA-2023:1043 9.8

Red Hat Security Advisory: Red Hat Single Sign-On 7.6.2 security update on RHEL 7

Record
RHSA-2023:1043
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2023:1044 9.8

Red Hat Security Advisory: Red Hat Single Sign-On 7.6.2 security update on RHEL 8

Record
RHSA-2023:1044
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2023:1045 9.8

Red Hat Security Advisory: Red Hat Single Sign-On 7.6.2 security update on RHEL 9

Record
RHSA-2023:1045
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
org.keycloak:keycloak-parent
Maven
 before 20.0.5
20.0.5
org.keycloak:keycloak-parent
Maven
 before 20.0.5, plus listed versions
1.0-alpha-11.0-alpha-1-120620131.0-alpha-21.0-alpha-31.0-alpha-4
Show 45 moreShow less
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
20.0.5
rh-sso7-keycloak
Red Hat:red_hat_single_sign_on:7.6::el7
From an advisory covering 31 CVEs
 before 0:18.0.6-1.redhat_00001.1.el7sso
0:18.0.6-1.redhat_00001.1.el7sso
rh-sso7-keycloak-server
Red Hat:red_hat_single_sign_on:7.6::el7
From an advisory covering 31 CVEs
 before 0:18.0.6-1.redhat_00001.1.el7sso
0:18.0.6-1.redhat_00001.1.el7sso
rh-sso7-keycloak
Red Hat:red_hat_single_sign_on:7.6::el8
From an advisory covering 31 CVEs
 before 0:18.0.6-1.redhat_00001.1.el8sso
0:18.0.6-1.redhat_00001.1.el8sso
rh-sso7-keycloak-server
Red Hat:red_hat_single_sign_on:7.6::el8
From an advisory covering 31 CVEs
 before 0:18.0.6-1.redhat_00001.1.el8sso
0:18.0.6-1.redhat_00001.1.el8sso
rh-sso7-keycloak
Red Hat:red_hat_single_sign_on:7.6::el9
From an advisory covering 31 CVEs
 before 0:18.0.6-1.redhat_00001.1.el9sso
0:18.0.6-1.redhat_00001.1.el9sso
rh-sso7-keycloak-server
Red Hat:red_hat_single_sign_on:7.6::el9
From an advisory covering 31 CVEs
 before 0:18.0.6-1.redhat_00001.1.el9sso
0:18.0.6-1.redhat_00001.1.el9sso

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
SourceLinkDate
PoC in GitHubshoucheng3/keycloak__keycloak_CVE-2022-4137_20-0-32025-08-19

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV, PoC in GitHub

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

In short

CVE-2022-4137 is a high vulnerability (CVSS 8.1) in Redhat Keycloak, published March 1, 2023. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 1.19%, the 68th percentile. Fixed in org.keycloak:keycloak-parent 20.0.5.

References

Show 151 moreShow less
This page doesn't list everything

Left out here: 97 versions. The JSON record has them.

Pages All vulnerabilities Browse Docs Sources Guide Get API key
MoveEnter Open