Best injection plugins for WordPress
The most popular injection plugins for WordPress in November 2026, in WordPress.org’s own popular order, which follows active installs. Host Header Injection Fix leads with 400+ active installs, ahead of Plug and Quiz (60+) and Code Injection (10+). All 5 plugins tagged “injection” are below, with figures from WordPress.org that update every day.
Installs aren’t everything: a recent release, a “Tested up to” that matches the current WordPress, and support threads that get resolved show a plugin is looked after. Open any plugin for its downloads, rank history and alternatives.
Research this niche or see all plugins.
Top 5 injection plugins
- 1.
Host Header Injection FixThe most installed injection plugin, with 400+ active installs. Rated 5.0 from 6 reviews, updated 4 days ago.
- 2.
Plug and Quiz60+ active installs. No reviews yet, last updated 1 year ago. Tested only up to WordPress 6.8.12.
- 3.
Code Injection10+ active installs. No reviews yet, last updated 2 years ago. Tested only up to WordPress 6.3.14.
- 4.
SpoofProof10+ active installs. No reviews yet, last updated 10 years ago. Tested only up to WordPress 4.6.30.
- 5.
Condition-based HTML Snippet InjectionFewer than 10 active installs. Only 1 review so far, last updated 7 years ago. Tested only up to WordPress 5.2.30.
All 5 plugins tagged “injection”
Host Header Injection Fix
Down in the last 7 days:21#9,397by Jeff Starr4 days ago
Sets custom headers for WP notification emails. Also fixes a security issue with WP versions < 5.5.
- Installs
- 400+
- Rating
- 5.0(6)
- Downloads
- 17/day
Plug and Quiz
Down in the last 7 days:90#20,053by plugandquiz1 year ago
A simple plugin to easily integrate interactive quizzes from Plug and Quiz into your WordPress site.
- Installs
- 60+
- Rating
- –
- Downloads
- 0/day
Code Injection
#33,019by Rmanaf3 years ago
This plugin allows you to effortlessly create custom ads for your website. Inject code snippets in HTML, CSS, and JavaScript, write and run custom plu …
- Installs
- 10+
- Rating
- –
- Downloads
- 0/day
SpoofProof
Up in the last 7 days:3,186#42,230by ciphertooth10 years ago
SpoofProof alters the WP login screen using a web service to verify that you are not being attacked by spoofing, phishing, or Man in the middle.
- Installs
- 10+
- Rating
- –
- Downloads
- 1/day
Condition-based HTML Snippet Injection
#63,476by Javan7 years ago
This Condition Injection plugin enables you to add html code to the footer of your blog based on your selected conditions.
- Installs
- <10
- Rating
- 5.0(1)
- Downloads
- 0/day