Keycloak phishing attack via email verification step in first login flow

高 7.1CVE-2025-7365 · GHSA-xhpr-465j-7p9q · 10/07/2025 公開 · 31/08/2026 更新

要点

CVE-2025-7365 は org.keycloak:keycloak-services に影響する深刻度「高」 (CVSS 7.1) の脆弱性です。
今後30日間に悪用される確率（EPSS）：0.27%（全脆弱性の 19.8% より高い）。
対処：26.2.6, 26.0.13 以降に更新してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
org.keycloak:keycloak-services Maven	`≥ 26.2.0, < 26.2.6< 26.0.13`	`26.2.626.0.13`

概要

There is a flaw with the first login flow where, during a IdP login, an attacker with a registered account can initiate the process to merge accounts with an existing victim's account. The attacker will subsequently be prompted to "review profile" information, which allows the the attacker to modify their email address to that of a victim's account. This triggers a verification email sent to the victim's email address. If the victim clicks the verification link, the attacker can gain access to the victim's account. While not a zero-interaction attack, the attacker's email address is not directly present in the verification email content, making it a potential phishing opportunity.

This issue has been fixed in versions 26.0.13, 26.2.6, and 26.3.0.

NVD の説明

A flaw was found in Keycloak. When an authenticated attacker attempts to merge accounts with another existing account during an identity provider (IdP) login, the attacker will subsequently be prompted to "review profile" information. This vulnerability allows the attacker to modify their email address to match that of a victim's account, triggering a verification email sent to the victim's email address. The attacker's email address is not present in the verification email content, making it a potential phishing opportunity. If the victim clicks the verification link, the attacker can gain access to the victim's account.