CVE-2025-10044Network attack vector

Phishing via unvalidated error description rendering

Published Sep 5, 2025 · Updated Dec 19, 2025

Input injection in Keycloak before 26.2.9 and 26.3.0 through 26.3.3 allows remote attackers to display deceptive error text. The account and admin consoles render the error_description query value as trusted interface text without validating it against recognized errors. A victim must follow the crafted URL and trust the rendered message; HTML encoding prevents script execution, limiting impact to phishing.

CVSS severity4.3
Medium
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Input injection in Keycloak before 26.2.9 and 26.3.0 through 26.3.3 allows remote attackers to display deceptive error text. The account and admin consoles render the error_description query value as trusted interface text without validating it against recognized errors. A victim must follow the crafted URL and trust the rendered message; HTML encoding prevents script execution, limiting impact to phishing.

The record

CVE
CVE-2025-10044
Published
Sep 5, 2025
Updated
Dec 19, 2025
Vendor
389 Directory Server
Product
Red Hat build of Keycloak
Classifications
CWE-79, T1204.001, T1566.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 5, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 19, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

389 Directory Server · Red Hat build of KeycloakAffected versions are unavailable in this record.
Keycloak · Keycloakversion=0 <26.2.9

Published CVSS scores

4.3Red Hat, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001User Execution: Malicious Link
T1566.002Phishing: Spearphishing Link

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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