kwtsms

kwtSMS replaces or supplements WordPress passwords with SMS one-time codes, sends WooCommerce order updates automatically, and lets you verify phone numbers on any contact form. Built on the <a href="https://www.kwtsms.com" rel="nofollow ugc">kwtSMS</a> SMS gateway.
Built for Arabic-speaking markets (Kuwait, Saudi Arabia, UAE, Bahrain, Qatar, Oman) with full RTL admin support and bilingual SMS templates in English and Arabic.
<h4>Authentication</h4>
<ul>
<li>2FA Mode: users log in with username + password, then confirm with a 6-digit SMS code</li>
<li>Passwordless Mode: users enter their phone number and receive an OTP to log in directly, no password needed</li>
<li>Both Modes: let each user choose their preferred method</li>
<li>Password Reset via SMS: replace the email link with an SMS OTP verification flow</li>
<li>Role-Based Enforcement: configure which user roles must pass OTP (exclude administrators, apply only to customers, etc.)</li>
<li>Welcome SMS: send a customisable welcome message when a new user registers</li>
<li>Country Code Dropdown: restrict the dial-code selector on login forms to GCC countries or a custom list</li>
</ul>
<h4>WooCommerce Integration</h4>
<ul>
<li>7 order status notifications: Processing, On-Hold (Shipped), Completed, Cancelled, Pending Payment, Refunded, Failed</li>
<li>Admin order notifications: automatically notify a configurable admin phone number on any order status change</li>
<li>Checkout OTP Gate: require phone verification before the customer can place an order (all methods or COD-only)</li>
<li>Per-status templates: independent English + Arabic SMS template for every order status</li>
<li>Admin SMS panel: send a custom free-text SMS to any order’s customer from the order edit screen</li>
<li>Stock alerts: low stock, out of stock, and backorder notifications to admin</li>
<li>New product SMS: notify admin when a product is first published</li>
<li>Back-in-stock notifications: customers subscribe on out-of-stock product pages, SMS sent automatically on restock</li>
<li>Instant new order SMS: notify admin the moment an order is placed, before status processing</li>
<li>Cart abandonment recovery: detect abandoned carts, send recovery SMS with auto-generated coupon codes, track recovery stats on the dashboard</li>
<li>Multivendor support: per-vendor order SMS for Dokan, WCFM, and WC Vendors</li>
<li>HPOS (High-Performance Order Storage) compatible</li>
</ul>
<h4>Contact Form Integrations</h4>
Each integration supports two modes: Notification (send a confirmation SMS on submit) and OTP Gate (block submission until the phone number is verified):
<ul>
<li>Contact Form 7</li>
<li>WPForms</li>
<li>Ninja Forms</li>
</ul>
<h4>Security</h4>
<ul>
<li>Sliding-window rate limiting per phone number, per IP address, and per user account</li>
<li>Duplicate OTP guard: reuses existing valid OTP on double-click or page reload</li>
<li>IP Allowlist/Blocklist with CIDR support for IPv4 and IPv6</li>
<li>IPHub proxy/VPN detection (optional): silently block or flag OTP requests from known proxies</li>
<li>Registration OTP gate: verify phone via OTP before account creation</li>
<li>Trusted Devices: trust a device for 30 days after 2FA, with profile revoke controls</li>
<li>Phone blocking list: silently drop OTP requests from blocked numbers (anti-enumeration)</li>
<li>Attempt lockout after configurable max failures</li>
<li>Google reCAPTCHA v3 and Cloudflare Turnstile support</li>
<li>All credentials stored server-side, never output to HTML</li>
<li>Nonces on every form and AJAX action</li>
<li>Anti-enumeration: password reset never reveals whether an account exists</li>
</ul>
<h4>External Services</h4>
This plugin connects to the following external services:
1. kwtSMS API (required): sends all SMS messages. <a href="https://www.kwtsms.com" rel="nofollow ugc">kwtsms.com</a> | <a href="https://www.kwtsms.com/policy.html" rel="nofollow ugc">Terms</a> | <a href="https://www.kwtsms.com/privacy.html" rel="nofollow ugc">Privacy</a>
2. ipapi.co (optional): detects visitor country for dial-code pre-selection. <a href="https://ipapi.co" rel="nofollow ugc">ipapi.co</a> | <a href="https://ipapi.co/terms/" rel="nofollow ugc">Terms</a> | <a href="https://ipapi.co/privacy/" rel="nofollow ugc">Privacy</a>
3. IPHub (optional): proxy/VPN detection on OTP requests. <a href="https://iphub.info" rel="nofollow ugc">iphub.info</a> | <a href="https://iphub.info/legal" rel="nofollow ugc">Terms</a> | <a href="https://iphub.info/legal" rel="nofollow ugc">Privacy</a>
4. Google reCAPTCHA v3 (optional): bot protection on OTP forms. <a href="https://www.google.com/recaptcha/" rel="nofollow ugc">google.com/recaptcha</a> | <a href="https://policies.google.com/terms" rel="nofollow ugc">Terms</a> | <a href="https://policies.google.com/privacy" rel="nofollow ugc">Privacy</a>
5. Cloudflare Turnstile (optional): alternative bot protection. <a href="https://www.cloudflare.com/products/turnstile/" rel="nofollow ugc">cloudflare.com/turnstile</a> | <a href="https://www.cloudflare.com/terms/" rel="nofollow ugc">Terms</a> | <a href="https://www.cloudflare.com/privacypolicy/" rel="nofollow ugc">Privacy</a>
<h4>Admin</h4>
<ul>
<li>Users Without Phone sub-page under the WordPress Users menu: lists all registered users missing a phone number, with a dynamic count badge on the menu item</li>
</ul>
<h4>Test Mode</h4>
Enable Test Mode in the Gateway settings to test without receiving real SMS messages. Messages are queued on the kwtSMS server but never delivered to the phone. Credits are still deducted. To recover them, log in to your kwtSMS account dashboard and delete the queued messages. The OTP code is visible under kwtSMS > Logs > Debug Log so you can complete flows during development.
<h4>Languages</h4>
Ships with English (default) and Arabic translations. The plugin admin UI and all user-facing strings are fully translatable.
<h3>Help & Support</h3>
<ul>
<li><a href="https://www.kwtsms.com/faq/" rel="nofollow ugc">kwtSMS FAQ</a>: Answers to common questions about credits, sender IDs, OTP, and delivery.</li>
<li><a href="https://www.kwtsms.com/support.html" rel="nofollow ugc">kwtSMS Support</a>: Open a support ticket or browse help articles.</li>
<li><a href="https://www.kwtsms.com/#contact" rel="nofollow ugc">Contact kwtSMS</a>: Reach the kwtSMS team directly for Sender ID registration and account issues.</li>
<li><a href="https://www.kwtsms.com/sender-id-help.html" rel="nofollow ugc">Sender ID Help</a>: Sender ID registration and guidelines.</li>
<li><a href="https://www.kwtsms.com/login/" rel="nofollow ugc">kwtSMS Dashboard</a>: Recharge credits, buy Sender IDs, view message logs, and manage coverage.</li>
<li><a href="https://www.kwtsms.com/integrations.html" rel="nofollow ugc">Other Integrations</a>: Plugins and integrations for other platforms and languages.</li>
<li><a href="https://github.com/boxlinknet/kwtsms-wordpress/issues" rel="nofollow ugc">Plugin Issues</a>: Report bugs or request features for this WordPress plugin.</li>
</ul>

kwtSMS: OTP & SMS Notifications

SMS OTP login, password reset, and WooCommerce order notifications via the kwtSMS gateway. Arabic RTL support included.

Ivan

The Google Authenticator plugin for WordPress gives you two-factor authentication using the Google Authenticator app for Android/iPhone/Blackberry.
If you are security aware, you may already have the Google Authenticator app installed on your smartphone, using it for two-factor authentication on Gmail/Dropbox/Lastpass/Amazon etc.
The two-factor authentication requirement can be enabled on a per-user basis. You could enable it for your administrator account, but log in as usual with less privileged accounts.
If You need to maintain your blog using an Android/iPhone app, or any other software using the XMLRPC interface, you can enable the App password feature in this plugin, 
but please note that enabling the App password feature will make your blog less secure.
<h3>Credits</h3>
Thanks to:
<a href="https://profiles.wordpress.org/evinak/" rel="nofollow ugc">Oleksiy</a> for a bugfix in multisite.
<a href="https://github.com/pancek" rel="nofollow ugc">Paweł Nowacki</a> for the Polish translation
<a href="https://github.com/FabioZumbi12" rel="nofollow ugc">Fabio Zumbi</a> for the Portuguese translation
<a href="https://www.guidoschalkx.com/" rel="nofollow ugc">Guido Schalkx</a> for the Dutch translation.
<a href="https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=henrik%40schack%2edk&lc=US&item_name=Google%20Authenticator&item_number=Google%20Authenticator&no_shipping=0&no_note=1&tax=0&bn=PP%2dDonationsBF&charset=UTF%2d8" rel="nofollow ugc">Henrik.Schack</a> for writing/maintaining versions 0.20 through 0.48
<a href="http://tobias.baethge.com/" rel="nofollow ugc">Tobias Bäthge</a> for his code rewrite and German translation.
<a href="http://blog.pcode.nl/" rel="nofollow ugc">Pascal de Bruijn</a> for his “relaxed mode” idea.
<a href="http://technobabbl.es/" rel="nofollow ugc">Daniel Werl</a> for his usability tips.
<a href="http://dd32.id.au/" rel="nofollow ugc">Dion Hulse</a> for his bugfixes.
<a href="https://profiles.wordpress.org/users/aldolat/" rel="nofollow ugc">Aldo Latino</a> for his Italian translation.
<a href="http://www.kaijia.me/" rel="nofollow ugc">Kaijia Feng</a> for his Simplified Chinese translation.
<a href="http://www.buayacorp.com/" rel="nofollow ugc">Alex Concha</a> for his security tips.
<a href="http://jetienne.com/" rel="nofollow ugc">Jerome Etienne</a> for his jquery-qrcode plugin.
<a href="http://orizhial.com/" rel="nofollow ugc">Sébastien Prunier</a> for his Spanish and French translation.

Google Authenticator

Personally I feel 2FA should be a part of WordPress core. But since it isn't, plugins like this one are a must-have to secure your sites.

The configuration interface is clearly layed out and the login page fits in perfectly with the default WP login page styling.

This plugin is light-weight, unobtrusive, free and adds that extra layer of security. Should your admin credentials ever be compromised, 2FA will keep your site secure.

Must-have security plugin

Awesome plugin, which is almost always in first group of plugin I've install on new website. Thank you for create and maintain it.

One on few my first-to-install plugin

Google Authenticator for your WordPress blog.

kwtSMS: OTP & SMS Notifications vs Google Authenticator