Keycloak-core: stored xss in keycloak when creating a items in admin console

published 2025-02-18 20 mo ago modified 2026-09-10 1 mo ago also GHSA-q4xq-445g-g6ch , EUVD-2024-32594

cvss: 3.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 22%
public exploits: 0; none known

A vulnerability was found in Keycloak. This issue may allow a privileged attacker to use a malicious payload as the permission while creating items (Resource and Permissions) from the admin console, leading to a stored cross-site scripting (XSS) attack.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-4028 updated 2026-08-09 cvss 3.8

keycloak-core: Stored XSS in Keycloak when creating a items in Admin Console

Red Hat Single Sign-On 7 rh-sso7-keycloak rh-sso7-keycloak
affected: workaround, no fix available “Currently the is no mitigation available for this vulnerability.”
Red Hat Build of Keycloak keycloak-core
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 20 mo ago (2025-02-18)

Exploit prediction

0.30% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	3.8	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
GitHub	3.1	3.8	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
maven	org.keycloak:keycloak-core	<=26.1.2	no fix listed

Affected products

Red Hat Red Hat Build of Keycloak
Red Hat Red Hat Single Sign-On 7

Classification

Weakness

CWE-20 Improper Input Validation
CWE-79 Improper Neutralization of Input During Web Page Generation

References

access.redhat.com /security/cve/CVE-2024-4028
vdb-entry, web
bugzilla.redhat.com /show_bug.cgi?id=2276418
issue-tracking, web
nvd.nist.gov /vuln/detail/CVE-2024-4028
advisory
github.com /keycloak/keycloak
package

Sources

CVE List CVE-2024-4028
GitHub Advisory GHSA-q4xq-445g-g6ch
NVD CVE-2024-4028

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary