Host Header Injection Fix vs Send

👉 Enables custom headers for WP email notifications 👉 Also provides a “set it and forget it” security fix for WP < 5.5 👉 Uses only 50KB of code, so super lightweight, fast, and effective Important As of WordPress 5.5, this plugin no longer is necessary to fix the host-header security issue reported in Ticket #25239 finally is fixed, and mentioned in this post WordPress 5.5 Beta 4. Thank You WordPress devs! Is this plugin still useful? Yes, it enables you to choose the “From”, “Name”, and “Return-Path” headers for all WP notification emails. And for versions of WordPress less than 5.5, this plugin continues to fix the host-header injection security issue. Features This simple plugin does three things: Sets custom From, Name, and Return-Path for WP notifications Fixes a security vulnerability in WordPress versions < 5.5 Fixes a bug where invalid email addresses may be generated (in WordPress versions < 5.5) Choose from the following options: Use WordPress defaults (insecure for WP < 5.5) Use “Email Address” from WP General Settings Use a custom name and address Plus there is an option to use the specified From address as the Return-Path header. Why? The security issue fixed by this plugin has been known about since way back in WordPress version 2.3. There has been some talk about fixing, but nothing has been implemented. While the issue does not affect all sites, it does affect a good percentage of them, including some of my own projects. So, not wanting to get hacked, I decided to write my own solution. Hopefully this issue gets fixed in a future version of WordPress, and this plugin will become unnecessary. As a bonus, setting an explicit From address resolves a long-standing bug whereby an invalid email address is generated under the following conditions: A “From” address is not set, And the $_SERVER['SERVER_NAME'] is empty So by explicitly setting a “From” address, we prevent this bug from happening. Security Issue What is the security issue addressed by this plugin? Follows is a quick summary. To learn more in-depth, check out the resources linked in the next section. WP uses $_SERVER['SERVER_NAME'] to set the “From” header in email notifications This includes sensitive email notifications like password resets and user registration In some cases, an attacker could modify the “From” header and intercept the email Using the intercepted email, an attacker could gain access to your site and wreak havoc More Infos This security vulnerability is well-known and has been around for a looong time. To learn more, check out these articles: WP Core Trac Ticket Exploit Box Info Exploit Database Privacy This plugin does not collect or store any user data. It does not set any cookies, and it does not connect to any third-party locations. Thus, this plugin does not affect user privacy in any way. Host Header Injection Fix is developed and maintained by Jeff Starr, 15-year WordPress developer and book author. Support development I develop and maintain this free plugin with love for the WordPress community. To show support, you can make a donation or purchase one of my books: The Tao of WordPress Digging into WordPress .htaccess made easy WordPress Themes In Depth Wizard’s SQL Recipes for WordPress And/or purchase one of my premium WordPress plugins: BBQ Pro – Blazing fast WordPress firewall Blackhole Pro – Automatically block bad bots Banhammer Pro – Monitor traffic and ban the bad guys GA Google Analytics Pro – Connect WordPress to Google Analytics Head Meta Pro – Ultimate Meta Tags for WordPress REST Pro Tools – Awesome tools for managing the WP REST API Simple Ajax Chat Pro – Unlimited chat rooms USP Pro – Unlimited front-end forms Links, tweets and likes also appreciated. Thank you! 🙂

Did you find this plugin helpful? Please consider leaving a 5-star review. Note: This is a forked version of the now unsupported wpMandrill plugin. The notes below are copied over from the original plugin and will be updated as relevant updates become available. Please help by contributing to the GitHub repository Send Emails With Mandrill on GitHub This plugin uses Mandrill API to send outgoing emails, with or without attachments, from your WordPress installation. It replaces the wp_mail function included with WordPress. Emails are tracked and automatically tagged for statistics within the Mandrill Dashboard. You can also add general tags to every email sent, as well as particular tags based on selected emails defined by your requirements. You can also use your own templates that have been added to your MailChimp account and shared with your Mandrill account. There are a few levels of integrations between your WordPress installation and this plugin: The simplest option: Install it, configure it, and Send Emails with Mandrill will start sending your emails through Mandrill. If you need to fine tune certain emails, you can change any email by creating a filter for the mandrill_payload hook. For further customization, we’ve exposed a function that allows you to send emails from within your plugins, instead of the regular wp_mail function: wpMandrill::mail Enable the connection by entering a valid API key in the settings page or adding the line define('SEWM_API_KEY', '{YOUR_API_KEY}') your site’s wp-config.php file. Spanish translation available. Request If you find that a part of this plugin isn’t working, please don’t simply click the WordPress “It’s broken” button. Let us know what’s broken in its support forum so we can make it better. Our mind-reading device still needs some tweaking. Localizations Send Emails with Mandrill is currently available in the following languages: Albanian (Shqip) Arabic (العربية) Armenian (Հայերեն) Basque (Euskara) Bengali (বাংলা) Bulgarian (Български) Catalan (Català) Chinese Simplified (简体中文) Croatian (Hrvatski) Czech (Čeština) Danish (Dansk) Dutch (Nederlands) Estonian (Eesti) Finnish (Suomi) French (Français) Galician (Galego) Georgian (ქართული) German (Deutsch) Greek (Ελληνικά) Hebrew (עברית) Hindi (हिन्दी) Hungarian (Magyar) Indonesian (Bahasa Indonesia) Irish (Gaeilge) Italian (Italiano) Japanese (日本語) Korean (한국어) Latvian (Latviešu) Lithuanian (Lietuvių) Macedonian (Македонски) Norwegian (Norsk) Persian (فارسی) Persian – Afghanistan (دری) Polish (Polski) Portuguese – Brazil (Português do Brasil) Portuguese – Portugal (Português) Romanian (Română) Russian (Русский) Serbian (Српски) Slovak (Slovenčina) Slovenian (Slovenščina) Spanish (Español) Swedish (Svenska) Tamil (தமிழ்) Thai (ไทย) Turkish (Türkçe) Ukrainian (Українська) Urdu (اردو) Vietnamese (Tiếng Việt) Welsh (Cymraeg) Known Issues Daily statistics will show data for the first 20 senders (emails) registered. Daily statistics will show data for the first 40 tags registered. If your account has more than 20 senders registered or more than 40 tags used, the detailed daily statisticas might show incompleted data.