WordPressプラグイン「AcyMailing – An Ultimate Newsletter Plugin and Marketing Automation Solution for WordPress」にクロスサイトスクリプティング（XSS）の脆弱性（CVE-2026-102562）
概要
WordPressプラグイン「AcyMailing – An Ultimate Newsletter Plugin and Marketing Automation Solution for WordPress」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 11.1.0 以前に影響があります。
修正版 11.1.1 への更新が推奨されます。
脆弱性の基本情報
| 脆弱性ID |
CVE-2026-102562 WF-eb8f03fb-d1af-4727-87d7-58dbe4013d8a |
|---|---|
| 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12日 |
| 更新日 | 2026年10月13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「AcyMailing – An Ultimate Newsletter Plugin and Marketing Automation Solution for WordPress」 |
11.1.0 以前 | 11.1.1 | Wordfence Intelligence |
推奨対応
- WordPressプラグイン「AcyMailing – An Ultimate Newsletter Plugin and Marketing Automation Solution for WordPress」を修正版 11.1.1 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
AcyMailing <= 11.1.0 - Unauthenticated Stored Cross-Site Scripting via 'customField[]' Parameter
The AcyMailing plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the customField[] parameter of the public frontusers::subscribe endpoint in versions up to, and including, 11.1.0. This is due to insufficient input sanitization and output escaping in the acym_cleanVar() sanitizer, whose HTML-tag stripper only matches complete tags (requiring a closing '>'), together with SubscriberInsertion::replaceUserInformation() and the archive view template, which substitute the stored subscriber field value into the mail body and emit it without HTML encoding. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses the online-archive URL for the poisoned subscriber, including administrators who click the plugin-generated link in the Subscribers → History screen.
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