WordPressプラグイン「Alt Text AI – Automatically generate image alt text for SEO and accessibility」に認可の欠如の脆弱性（CVE-2026-91108）
概要
WordPressプラグイン「Alt Text AI – Automatically generate image alt text for SEO and accessibility」に認可の欠如の脆弱性が確認されました。
バージョン 1.10.41 以前に影響があります。
修正版 1.10.42 への更新が推奨されます。
脆弱性の基本情報
| 脆弱性ID |
CVE-2026-91108 WF-216e3087-52f1-4b2e-a31c-0c2ddf41aefb |
|---|---|
| 脆弱性の種類 | 認可の欠如 |
| 危険度 | 中 |
| CVSSスコア |
4.3（CVSS v3.1） CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
| 公開日 | 2026年10月2日 |
| 更新日 | 2026年10月3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「Alt Text AI – Automatically generate image alt text for SEO and accessibility」 |
1.10.41 以前 | 1.10.42 | Wordfence Intelligence |
推奨対応
- WordPressプラグイン「Alt Text AI – Automatically generate image alt text for SEO and accessibility」を修正版 1.10.42 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
Alt Text AI <= 1.10.41 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Post Content Modification via atai_enrich_post_content AJAX Action
The Alt Text AI – Automatically generate image alt text for SEO and accessibility plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.10.41. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to overwrite the post_content of any post or page on the site — including content they do not own — with LLM-generated text influenced by attacker-controlled keywords, enabling black-hat SEO manipulation and unauthorized consumption of the site owner's paid AltText.ai API credits. The nonce required to invoke the action is emitted on every admin page including /wp-admin/profile.php, which is accessible to Subscribers, making the nonce trivially obtainable by any authenticated user.
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