WordPressプラグイン「User Registration PRO – Custom Registration Form, Login Form, and User Profile WordPress Plugin」にクロスサイトスクリプティング（XSS）の脆弱性（CVE-2026-87111）
概要
WordPressプラグイン「User Registration PRO – Custom Registration Form, Login Form, and User Profile WordPress Plugin」にクロスサイトスクリプティング（XSS）の脆弱性が確認されました。
バージョン 6.2.9 以前に影響があります。
修正版 6.3.0 への更新が推奨されます。
脆弱性の基本情報
| 脆弱性ID |
CVE-2026-87111 WF-493ac933-f2b3-487b-8fc7-af2df9b0d460 |
|---|---|
| 脆弱性の種類 | クロスサイトスクリプティング（XSS） |
| 危険度 | 高 |
| CVSSスコア |
7.2（CVSS v3.1） CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
| 公開日 | 2026年10月15日 |
| 更新日 | 2026年10月16日 |
影響を受ける製品
| 製品 | 影響を受けるバージョン | 修正版 | 出典 |
|---|---|---|---|
| WordPressプラグイン「User Registration PRO – Custom Registration Form, Login Form, and User Profile WordPress Plugin」 |
6.2.9 以前 | 6.3.0 | Wordfence Intelligence |
推奨対応
- WordPressプラグイン「User Registration PRO – Custom Registration Form, Login Form, and User Profile WordPress Plugin」を修正版 6.3.0 またはそれ以降の公式最新版へ更新してください。
情報元の原文
Wordfence Intelligence
User Registration PRO <= 6.2.9 - Unauthenticated Stored Cross-Site Scripting via HTTP Referer Header
The User Registration PRO – Custom Registration Form, Login Form, and User Profile WordPress Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via HTTP Referer Header in all versions up to, and including, 6.2.9 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This vulnerability is present only in the premium build of the plugin and is not present in the free WordPress.org distribution. The nonce required to call the vulnerable AJAX endpoint is localized into the page source of every front-end page for anonymous visitors, making it fully obtainable by unauthenticated attackers.
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