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Host Header Injection Fix

v3.8

by Jeff Starr · updated 4 days ago

Sets custom headers for WP notification emails. Also fixes a security issue with WP versions < 5.5.

emailheadersinjectionnotificationsecurity
WordPress.org SaveAnalyze reviews Track this plugin
Rank
#9,400
Down3 vs yesterday
Active installs (est.)
≈ 454
400+ reported · High
Total downloads
28K
28,038 all-time
Rating
5.0/5
6 reviews
Support resolved
–
0 of 0 threads, last 2 months
Growing·Downloads +12.5% (30d)·Toward 500+ · ETA ~25d

Host Header Injection Fix at a glance

Host Header Injection Fix is a WordPress plugin by Jeff Starr with 400+ active installs, the #9,400 most popular plugin on WordPress.org. On a typical day it’s downloaded about 9 times, 13% more than the month before. It’s rated 5.0 out of 5 from 6 reviews. Version 3.8 came out on Nov 4, 2026 and is tested up to WordPress 7.2. It leads the 5 plugins tagged “injection”. It was first released in 2017.

Chart time range

Applies to every chart below. History from Oct 10, 2026, 30 days.

Showing the last 30 days. Full history comes with any paid plan.See plans

Downloads over time

Download stats

214 downloads · the last 30 days

Downloads over time
Host Header Injection Fix Compare series
Downloads over time: 24 days across 1 series.51015Oct 10Oct 14Oct 18Oct 22Oct 25Oct 29Nov 2Oct 29, 2026: Tested up to 7.1.4
View as table
DateHost Header Injection Fix
Nov 2, 202616
Nov 1, 202617
Oct 31, 202612
Oct 30, 20268
Oct 29, 20269
Oct 28, 20269
Oct 27, 202610
Oct 26, 202611
Oct 25, 20265
Oct 24, 20267
Oct 23, 20267
Oct 22, 20266
Oct 21, 20268
Oct 20, 20262
Oct 19, 202610
Oct 18, 202610
Oct 17, 20268
Oct 16, 20262
Oct 15, 20269
Oct 14, 202610
Oct 13, 20269
Oct 12, 20262
Oct 11, 202617
Oct 10, 202610

Unusual spikes are usually updates, not new installs.

Estimated installs

≈ 454 · -1.1% in the last 30 days

Estimated installs
Estimated installs: 13 days across 1 series.450455Oct 27Oct 29Oct 31Nov 2Nov 5Nov 7Nov 9Nov 5, 2026: Tested up to 7.2Oct 29, 2026: Tested up to 7.1.4
View as table
DateEstimated installs
Nov 9, 2026454
Nov 8, 2026454
Nov 7, 2026454
Nov 5, 2026454
Nov 4, 2026453
Nov 3, 2026452
Nov 2, 2026453
Nov 1, 2026454
Oct 31, 2026455
Oct 30, 2026456
Oct 29, 2026450
Oct 28, 2026457
Oct 27, 2026459

Rank over time

#9,400 · down 41 in the last 30 days

Popular rank
Popular rank: 14 days across 1 series.#9.4K#9.5KOct 27Oct 29Oct 31Nov 2Nov 5Nov 7Nov 9Nov 5, 2026: Tested up to 7.2Oct 29, 2026: Tested up to 7.1.4
View as table
DateDaily snapshot
Nov 9, 2026#9,400
Nov 8, 2026#9,397
Nov 7, 2026#9,391
Nov 6, 2026#9,382
Nov 5, 2026#9,377
Nov 4, 2026#9,391
Nov 3, 2026#9,404
Nov 2, 2026#9,383
Nov 1, 2026#9,376
Oct 31, 2026#9,361
Oct 30, 2026#9,361
Oct 29, 2026#9,450
Oct 28, 2026#9,366
Oct 27, 2026#9,359

Growth %

Average -0.08% a day in the last 30 days

Growth %, day over day
Growth %, day over day: 12 days across 1 series.-1%0%1%Oct 28Oct 30Nov 1Nov 3Nov 5Nov 7Nov 9
View as table
DateGrowth
Nov 9, 20260.00%
Nov 8, 20260.00%
Nov 7, 20260.00%
Nov 5, 2026+0.22%
Nov 4, 2026+0.22%
Nov 3, 2026-0.22%
Nov 2, 2026-0.22%
Nov 1, 2026-0.22%
Oct 31, 2026-0.22%
Oct 30, 2026+1.33%
Oct 29, 2026-1.53%
Oct 28, 2026-0.44%

Active installs band

400+ on WordPress.org

Active installs (rounded band)
Active installs (rounded band): 14 days across 1 series.380400420Oct 27Oct 29Oct 31Nov 2Nov 5Nov 7Nov 9Nov 5, 2026: Tested up to 7.2Oct 29, 2026: Tested up to 7.1.4
View as table
DateDaily snapshot
Nov 9, 2026400+
Nov 8, 2026400+
Nov 7, 2026400+
Nov 6, 2026400+
Nov 5, 2026400+
Nov 4, 2026400+
Nov 3, 2026400+
Nov 2, 2026400+
Nov 1, 2026400+
Oct 31, 2026400+
Oct 30, 2026400+
Oct 29, 2026400+
Oct 28, 2026400+
Oct 27, 2026400+

Search rankings

Where it appears in WordPress.org search for the searches you track, checked every day.

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Change log

From our daily snapshot of WordPress.org
  1. So far:Rank #9391 → #9400
    • Tested up to 7.1.4 → 7.2
    • Released 3.8 (was 3.7)
  2. Rank #9366 → #9377
    • Tested up to 7.1.3 → 7.1.4

Versions in use

Share of active installs on each published version, from WordPress.org.

  • v3.737%
  • v3.834%
  • v3.38.8%
  • v3.65.6%
  • Other15%

Rating trend

5.0★★★★★6 reviews · steady in the last 30 days

Requirements & info

Version history
Version
3.8
Requires WordPress
4.7
Tested up to
7.2
Requires PHP
5.6.20
First released
Nov 6, 2017
Last updated
Nov 4, 2026
Releases, last 12 months
…

Questions about Host Header Injection Fix

How many websites use Host Header Injection Fix?

Host Header Injection Fix is active on 400+ WordPress sites, as WordPress.org reports it. WordPress.org rounds the number down, so the real count is somewhat higher. That makes it the #9,400 most popular plugin on WordPress.org.

How many times has Host Header Injection Fix been downloaded?

28,038 times in total since 2017. On a typical day it’s downloaded about 9 times. See download stats

When was Host Header Injection Fix last updated?

Version 3.8 came out on Nov 4, 2026 (4 days ago).

Is Host Header Injection Fix compatible with the latest WordPress?

Yes. It’s tested up to WordPress 7.2, ahead of the current 7.1.

Is Host Header Injection Fix still maintained?

Yes. Its last release was 4 days ago. No support threads were opened in the last two months.

What rating does Host Header Injection Fix have?

5.0 out of 5 from 6 reviews on WordPress.org. 100% of them give 5 stars.

What are the best alternatives to Host Header Injection Fix?

The plugins most like Host Header Injection Fix, by the tags they share, are Manage Notification E-mails (100K+), WP Hide & Security Enhancer (50K+) and Customize WordPress Emails and Alerts (30K+). Compare all alternatives

Latest reviews

Analyze reviews
All reviews on WordPress.org

Review stats

5.0

★★★★★

6 reviews

  • 5 stars: 6 reviews, 100%
  • 4 stars: 0 reviews, 0%
  • 3 stars: 0 reviews, 0%
  • 2 stars: 0 reviews, 0%
  • 1 stars: 0 reviews, 0%
Positive
100%4–5★
Mixed
0%3★
Critical
0%1–2★

Compare with competitors

Add up to 1 competitor. No account needed.

Starter · 1 competitor
Host Header Injection Fix
Suggested:
Metric
Host Header Injection Fix
Estimated installs≈ 454
Reported installs400+
Rating5.0
Reviews6
Total downloads28K
AuthorJeff Starr
First releasedNov 6, 2017
Version3.8
Requires WP4.7
Requires PHP5.6.20
Last updatedNov 4, 2026

Alternatives to Host Header Injection Fix

Compare all alternatives

Popular plugins with the same tags, the most in common first.

Side by side:Host Header Injection Fix vs Manage Notification E-mailsHost Header Injection Fix vs WP Hide & Security EnhancerHost Header Injection Fix vs Customize WordPress Emails and Alerts

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