4.3

CVE-2025-10044: keycloak Cross-site Scripting

CVSS: 4.3v3.1MediumDeferred
AliasesCGA-27mm-8gc8-623gCGA-4p77-8v7f-wprmCGA-69cf-2f46-vjqw
Published 05-09-2025Last modified 19-12-2025
Open JSON

Vulnerability summary

CVE-2025-10044 is a medium (CVSS 4.3) Cross-site Scripting vulnerability in keycloak. EPSS estimates a 0.31% chance of exploitation in the next 30 days, higher than 22.2% of scored vulnerabilities.

Overall risk
17/100
0100
Low · default modelHow is this calculated?
CVSS score
4.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.31%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 0 · Related 1
CGA-8PFG-WPV7-M67V

Timeline

  1. 05-09-2025
    PublishedVulnerability first disclosed.
  2. 19-12-2025
    Last modifiedVulnerability information updated.

Description

A flaw was found in Keycloak. Keycloak’s account console and other pages accept arbitrary text in the error_description query parameter. This text is directly rendered in error pages without validation or sanitization. While HTML encoding prevents XSS, an attacker can craft URLs with misleading messages (e.g., fake support phone numbers or URLs), which are displayed within the trusted Keycloak UI. This creates a phishing vector, potentially tricking users into contacting malicious actors.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.31%

Chance of exploitation in the next 30 days

Percentile

22%

Versus all other CVEs

30-day change

0.00 pp

From 0.31% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.31%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard3 products
  • keycloak-26.2< 26.2.5-r6 | All versions (No fix recorded)
  • keycloak-26.2-iamguarded-compatAll versions (No fix recorded)
  • keycloak-fips-26.2-iamguarded-fipsAll versions (No fix recorded)
Org.keycloak2 products
  • keycloak-account-ui< 26.2.9 | ≥ 26.3.0, < 26.3.4
  • keycloak-admin-ui< 26.2.9 | ≥ 26.3.0, < 26.3.4
Keycloak1 product

3 vendors · 6 products

References

14 links
Show all 14 references