WordPressプラグイン「QuickCal」にクロスサイトスクリプティング（XSS）の脆弱性（CVE-2026-15984）
概要
WordPressプラグイン「QuickCal」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 1.0.20 以前に影響があります。
脆弱性の基本情報
| 脆弱性ID |
CVE-2026-15984 WF-9bfcfc13-ccfb-4319-99a7-7d7510a11cfe |
|---|---|
| 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9月4日 |
| 更新日 | 2026年9月5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「QuickCal」 |
1.0.20 以前 | — | Wordfence Intelligence |
推奨対応
- WordPressプラグイン「QuickCal」の提供元が公開している最新情報を確認し、公式の最新版へ更新してください。
情報元の原文
Wordfence Intelligence
QuickCal <= 1.0.20 - Unauthenticated Stored Cross-Site Scripting via Custom Field Parameters
The QuickCal plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Custom Field Parameters in all versions up to, and including, 1.0.20 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. The nonce guarding the unauthenticated booked_add_appt AJAX action is publicly embedded on any page rendering the booking calendar shortcode, making it trivially obtainable by unauthenticated attackers without any prior account or privilege.
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