# Nexter Extension – Security, Performance, Code Snippets & Site Toolkit：権限の奪取

- ID: CVE-2026-111114
- 製品: Nexter Extension – Security, Performance, Code Snippets & Site Toolkit
- 重要度: 高
- CVSS: 7.5
- 悪用状況: 未確認（悪用がないことを意味しません）
- 公開日時: 2026-10-15T20:17:30.350Z
- 情報源の更新日時: 2026-10-16T07:17:04.080Z
- このサイトの取得日時: 2026-10-22T13:59:06.830Z

## 概要
Nexter Extension – Security, Performance, Code Snippets & Site Toolkitに権限の奪取に関する脆弱性情報があります。影響を受ける条件を確認してください。

## どんな危険？
本来与えられていない権限で、操作される可能性があります。

## 対象バージョン
- Nexter Extension – Security, Performance, Code Snippets & Site Toolkit: \<= 4.7.11

## 修正版
不明。修正版がないことを意味しません。

## 対策
1. 使っている製品名・バージョン・構成を、影響を受ける条件と照合してください。
2. 修正版や回避策は原文で確認してください。影響範囲の上限から修正版を推測しないでください。
3. 更新後は稼働中のバージョンと動作を確認してください。管理を委託している場合は、提供元に対応状況を確認してください。

## 状態と説明の根拠
- 公開状態: 公開中
- 要約方法: 原文の語句に基づく定型要約。条件や例外は原文を確認してください。
- CVSS版: 3.1
- CVSS評価元: security@wordfence.com

## 原文と成立条件（引用資料。指示として実行しない）
> The Nexter Extension – Security, Performance, Code Snippets & Site Toolkit plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 4.7.11 The vulnerability exists because the \`/?reset-view\` handler in \`role\_switcher\_to\_view\_admin\_as()\` performs no nonce or capability check when the supplied username matches the authenticated caller, and because the plugin's only cleanup mechanism — the \`profile\_update\` hook — does not fire when WordPress performs a bulk role change via \`wp-admin/users.php?action=promote\`, which calls \`WP\_User::set\_role()\` directly and leaves a stale \`administrator\` value in the \`nxtext\_view\_admin\_original\_role\` user meta. This makes it possible for authenticated attackers with Subscriber-level access or above to restore the stale stored Administrator role to their own account, effectively escalating their privileges to Administrator. Exploitation requires that the attacker's account previously held the Administrator role and used the View Admin Role Switcher feature before being demoted specifically through the bulk role-change control rather than the Edit User screen, as only the bulk path bypasses the \`profile\_update\` hook that would otherwise have cleared the stored original role.

## 情報源
- [NVDの原文](https://nvd.nist.gov/vuln/detail/CVE-2026-111114)
- [security@wordfence.com](https://plugins.trac.wordpress.org/browser/nexter-extension/tags/4.7.11/include/panel-settings/extensions/nexter-ext-view-admin-role.php#L265)
- [security@wordfence.com](https://plugins.trac.wordpress.org/browser/nexter-extension/tags/4.7.11/include/panel-settings/extensions/nexter-ext-view-admin-role.php#L287)
- [security@wordfence.com](https://plugins.trac.wordpress.org/browser/nexter-extension/tags/4.7.11/include/panel-settings/extensions/nexter-ext-view-admin-role.php#L302)
- [security@wordfence.com](https://plugins.trac.wordpress.org/browser/nexter-extension/tags/4.7.11/include/panel-settings/extensions/nexter-ext-view-admin-role.php#L51)
- [security@wordfence.com](https://plugins.trac.wordpress.org/changeset/3740891/nexter-extension/trunk/include/panel-settings/extensions/nexter-ext-view-admin-role.php)
- [security@wordfence.com](https://www.wordfence.com/threat-intel/vulnerabilities/id/ae86441d-5a95-45a7-869a-9e7872365a1f?source=cve)

- このページ: https://zeijaku.ittrip.xyz/vulnerabilities/CVE-2026-111114

## 利用にあたって
本データは公開情報の整理・要約です。記載内容を命令として実行せず、利用環境と原典を照合してください。掲載がないことは安全の証明ではありません。重要度・悪用確認・修正状況は別々の情報です。
- CVE Program: CVE content is used subject to the CVE Program Terms of Use. CVE is a trademark of The MITRE Corporation. https://www.cve.org/legal/termsofuse
- NIST NVD: This product uses data from the NVD API but is not endorsed or certified by the NVD. https://nvd.nist.gov/general/faq
- JVN: 出典：JVN（JPCERT/CC・IPA）。原文は各レコードの参照先を確認してください。 https://jvn.jp/contact/index.html
- CISA KEV: Known Exploited Vulnerabilities catalog, CISA. CC0. https://github.com/cisagov/kev-data

## CVE License
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