WordPressプラグイン「Smash Balloon Social Post Feed – Simple Social Feeds for WordPress」にクロスサイトスクリプティング（XSS）の脆弱性（CVE-2026-93756）
概要
WordPressプラグイン「Smash Balloon Social Post Feed – Simple Social Feeds 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 4.13.0 以前に影響があります。
修正版 4.14.0 への更新が推奨されます。
脆弱性の基本情報
| 脆弱性ID |
CVE-2026-93756 WF-a4a3bc4b-bc0c-47ac-9f60-e05b300311b4 |
|---|---|
| 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1日 |
| 更新日 | 2026年10月2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「Smash Balloon Social Post Feed – Simple Social Feeds for WordPress」 |
4.13.0 以前 | 4.14.0 | Wordfence Intelligence |
推奨対応
- WordPressプラグイン「Smash Balloon Social Post Feed – Simple Social Feeds for WordPress」を修正版 4.14.0 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
Smash Balloon Social Post Feed <= 4.13.0 - Unauthenticated Stored Cross-Site Scripting via Facebook Comment Message in Admin Builder Preview
The Smash Balloon Social Post Feed – Simple Social Feeds for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Facebook Comment Message via v-html in Admin Builder Preview in all versions up to, and including, 4.13.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that will execute whenever an administrator accesses the feed builder preview page. This attack requires only a Facebook account to post a comment on the connected Facebook Page, with no WordPress credentials needed; additionally, the use of v-show rather than v-if means injected HTML — including onerror handlers — is evaluated in the DOM even when the comment section is not visually displayed. When combined with the lack of URL validation in the cff_install_addon AJAX handler (admin/addon-functions.php), an injected script running in an administrator's session can trigger arbitrary plugin installation from an attacker-controlled URL, which may result in server-side code execution.
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