CVE-2022-4137

mediumpriority · track · 34EPSS 0.012 · 68 %ileexploit · PoCEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

1.19% (68th) EPSS

CVSS 6.1 · medium

Is it mine?

9 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

8.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.8–8.1

v3.16.1mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 2.7

v3.18.1highAV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Nsecondary · FSTEC (BDU) RU

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Nsecondary · ENISA EU

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Nsecondary · secalert@redhat.com USexploitability 2.8 · impact 5.2

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Nsecondary · OSV

v3.15.8mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:Psecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-79USprimaryCWE-116USCWE-79USCWE-79USCWE-81US

exploits (1)

Public proof-of-concept and weaponised exploit code.

shoucheng3/keycloak__keycloak_CVE-2022-4137_20-0-3shoucheng3/keycloak__keycloak_CVE-2022-4137_20-0-3PoC · poc_in_github

affected products (9)

Products and version ranges known to be affected.

Red Hat Red Hat Single Sign-On 7.6 for RHEL 7< 0:18.0.6-1.redhat_00001.1.el7ssoenisa_euvdEU
Red Hat Red Hat Single Sign-On 7.6 for RHEL 8< 0:18.0.6-1.redhat_00001.1.el8ssoenisa_euvdEU
Red Hat Red Hat Single Sign-On 7.6 for RHEL 9< 0:18.0.6-1.redhat_00001.1.el9ssoenisa_euvdEU
Red Hat Inc. Keycloak≤ 22.0.1fstec_bduRU
Red Hat Inc. Keycloak19.0.3 → 20.0.4fstec_bduRU
Red Hat Inc. Red Hat Single Sign-On≤ 7.6fstec_bduRU
redhat keycloakall versionsnvdUScpe:2.3:a:redhat:keycloak:*:*:*:*:*:*:*:*
redhat single sign-on= 7.6nvdUScpe:2.3:a:redhat:single_sign-on:*:*:*:*:*:*:*:*
Maven org.keycloak:keycloak-parent< 20.0.5osvUSpkg:maven/org.keycloak/keycloak-parent

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-9hhc-pj4w-w5rvKeycloak Cross-site Scripting on OpenID connect login service2023-03-01ghsa · osvUS
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.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd osv NVD CVE.org MITRE

published 2023-09-25modified 2026-06-17

related (53,008)

Related entries.

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An issue was discovered in Zimbra Collaboration (ZCS) 8.8.15 and 9.0 and 10.0 and 10.1. A Cross-Site Scripting (XSS) vulnerability in the Zimbra Classic UI allows attackers to exec…
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+53003 more

references (21)

External citations — patches, advisories, analysis.

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