WordPressプラグイン「BetterDocs – AI Documentation, Knowledge Base, MCP Server, Docs, Wikis, FAQ & Chatbot」にクロスサイトスクリプティング（XSS）の脆弱性（CVE-2026-75980）
概要
WordPressプラグイン「BetterDocs – AI Documentation, Knowledge Base, MCP Server, Docs, Wikis, FAQ & Chatbot」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 4.8.1 以前に影響があります。
修正版 4.8.2 への更新が推奨されます。
脆弱性の基本情報
| 脆弱性ID |
CVE-2026-75980 WF-d1305df9-5002-4352-875c-2dcba7b06c10 |
|---|---|
| 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8月31日 |
| 更新日 | 2026年9月1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「BetterDocs – AI Documentation, Knowledge Base, MCP Server, Docs, Wikis, FAQ & Chatbot」 |
4.8.1 以前 | 4.8.2 | Wordfence Intelligence |
推奨対応
- WordPressプラグイン「BetterDocs – AI Documentation, Knowledge Base, MCP Server, Docs, Wikis, FAQ & Chatbot」を修正版 4.8.2 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
BetterDocs <= 4.8.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via Heading 'id' Attribute in Post Content
The BetterDocs – AI Documentation, Knowledge Base, Docs, Wikis, FAQ with Chatbot plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Heading 'id' Attribute in Post Content in all versions up to, and including, 4.8.1 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. The exploit survives wp_kses_post because entity-encoded quotes in a heading id attribute are treated as a single legitimate attribute value at save time; the dangerous payload only materialises after process_content_for_toc() calls html_entity_decode() on the stored content and the broken id is extracted by a lazy regex before being echoed unescaped into the Table of Contents output.
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