Web Application
CVE-2026-16636 high CVSS 7.2

Cross-Site Scripting (XSS) in WordPress (CVE-2026-16636)

Summary

Cross-site scripting in WordPress (CVE-2026-16636). Risk of unauthorized operations or information disclosure.

Original description

The description as published by the source.

The FluentSMTP – WP SMTP Plugin with Amazon SES, SendGrid, MailGun, Postmark, Google and Any SMTP Provider plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Recipient Display Name (to.name) in Email Logs in all versions up to, and including, 2.2.95 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The payload is delivered via an attacker-controlled recipient display name (to.name) in a wp_mail() call and does not fire in the log list view — only in the detail view when an administrator uses the Prev/Next navigation controls, as that path bypasses the escapeHtml pipeline used by the list view.

Source: NIST National Vulnerability Database NVD GitHub Advisory

AI summary

Written by an external AI model and may contain mistakes. Check the original description and references below before acting on it.

FluentSMTPプラグインは、受信者表示名を介した保存型クロスサイトスクリプティング(XSS)に対して脆弱です。この脆弱性は、不十分な入力サニタイズと出力エスケープに起因します。攻撃者は、管理者が詳細ビューを使用する際に実行されるスクリプトを注入可能です。

❓ What is the problem

FluentSMTPプラグインでの保存型XSS脆弱性

📍 Affected scope

バージョン2.2.95以下のFluentSMTPプラグイン

🔥 Severity

認証されていない攻撃者が任意のスクリプトを管理者に対して実行可能

🔧 How to fix

入力を適切にサニタイズし、出力をエスケープすること

🛡️ Workaround

詳細ビューでの閲覧を避ける

🔍 Detection

影響を受ける場合、管理者が詳細ビューを使用した際、意図しないスクリプト実行を確認する

References

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