WordPressプラグイン「AI Agent by SiteGround」に認可の欠如の脆弱性（CVE-2026-17153）
概要
WordPressプラグイン「AI Agent by SiteGround」に認可の欠如の脆弱性が確認されました。
バージョン 1.2.7 以前に影響があります。
修正版 1.2.8 への更新が推奨されます。
脆弱性の基本情報
| 脆弱性ID |
CVE-2026-17153 WF-6280f40e-2998-43d4-a78f-b393e4f36df5 |
|---|---|
| 脆弱性の種類 | 認可の欠如 |
| 危険度 | 中 |
| CVSSスコア |
5.3（CVSS v3.1） CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
| 公開日 | 2026年8月19日 |
| 更新日 | 2026年8月20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「AI Agent by SiteGround」 |
1.2.7 以前 | 1.2.8 | Wordfence Intelligence |
推奨対応
- WordPressプラグイン「AI Agent by SiteGround」を修正版 1.2.8 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
AI Agent by SiteGround <= 1.2.7 - Missing Authorization to Authenticated (Contributor+) Arbitrary Media Upload via /generate-content REST Endpoint
The AI Agent by SiteGround plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.2.7. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to upload images to the WordPress media library, bypassing the upload_files capability restriction that Contributors are normally subject to, as authenticated attackers with Contributor-level access or above can satisfy the endpoint's nonce and permission checks. The sg_ai_studio_gutenberg_nonce required by the endpoint is emitted to any user with block editor access — including Contributors — making the absent upload_files check the sole barrier to exploitation.
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