WordPressプラグイン「Custom Twitter Feeds – A Tweets Widget or X Feed Widget」にクロスサイトスクリプティング（XSS）の脆弱性（CVE-2026-84909）
概要
WordPressプラグイン「Custom Twitter Feeds – A Tweets Widget or X Feed Widget」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 2.8.0 以前に影響があります。
修正版 2.9.0 への更新が推奨されます。
脆弱性の基本情報
| 脆弱性ID |
CVE-2026-84909 WF-b1a9d042-c0c0-477a-8cdf-9fb9d2239059 |
|---|---|
| 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17日 |
| 更新日 | 2026年9月18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「Custom Twitter Feeds – A Tweets Widget or X Feed Widget」 |
2.8.0 以前 | 2.9.0 | Wordfence Intelligence |
推奨対応
- WordPressプラグイン「Custom Twitter Feeds – A Tweets Widget or X Feed Widget」を修正版 2.9.0 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
Custom Twitter Feeds <= 2.8.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'buttoncolor' Shortcode Attribute
The Custom Twitter Feeds – A Tweets Widget or X Feed Widget plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'buttoncolor' Shortcode Attribute in all versions up to, and including, 2.8.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This vulnerability is exploitable on common installs where the admin has configured access tokens with zero or multiple legacy feeds, as this causes the ctf_statuses support_legacy_shortcode option to be set to boolean true by default, activating the unfiltered legacy shortcode attribute code path.
Copyright 2012-2026 Defiant Inc.
Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy.
Copyright 1999-2026 The MITRE Corporation
CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.