WordPressプラグイン「Media Library Assistant」にクロスサイトスクリプティング（XSS）の脆弱性（CVE-2026-6642）
概要
WordPressプラグイン「Media Library Assistant」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 3.35 以前に影響があります。
修正版 3.36 への更新が推奨されます。
脆弱性の基本情報
| 脆弱性ID |
CVE-2026-6642 WF-6e45dc8a-b777-4a49-b1b1-c59ffa75f5b4 |
|---|---|
| 脆弱性の種類 | クロスサイトスクリプティング（XSS） |
| 危険度 | 中 |
| CVSSスコア |
6.4（CVSS v3.1） CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
| 公開日 | 2026年9月10日 |
| 更新日 | 2026年9月11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「Media Library Assistant」 |
3.35 以前 | 3.36 | Wordfence Intelligence |
推奨対応
- WordPressプラグイン「Media Library Assistant」を修正版 3.36 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
Media Library Assistant <= 3.35 - Authenticated (Author+) Stored Cross-Site Scripting via Bulk Edit Preset Export/Import
The Media Library Assistant plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the bulk edit preset export/import mechanism in versions up to and including 3.35. This is due to insufficient output escaping on preset field values when they are rendered in HTML attribute contexts in the mla_generate_bulk_edit_form_fieldsets() function and mla-bulk-edit-fieldsets.tpl template. While wp_kses() filtering is applied during preset export for users without unfiltered_html capability, this does not prevent attribute injection attacks since the malicious payload consists of quotes and HTML attributes rather than HTML tags. When preset values are retrieved and rendered, they are directly assigned to template variables without esc_attr() escaping and then inserted into input element value attributes via simple string replacement. This makes it possible for authenticated attackers, with Author-level access and above (upload_files capability), to inject arbitrary web scripts that execute when an administrator imports the poisoned preset and the targeted input field receives focus.
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