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Host Header Injection Fix

by Jeff Starr · Email & Marketing

Also makes 30 other plugins · 1.1M+ installs across the portfolio →

Free audit wp.org ↗

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

⚠ Few reviews
How scoring works →
86 Health · A
Maintenance 100/100
Rating quality 82/100
Support 70/100

86 health vs 63 average across 1,297 Email & Marketing plugins

400+

Active installs

≈460 estimated

27.2K

Total downloads

since 2017

4.27★

Rating (adjusted)

5.0★ raw · 6 reviews

-41%

290

Downloads · 30d

category median +18%

Directory ranking optimization

How it's scored →

How well this listing is tuned to rank in WordPress.org search, on the factors an owner controls. Not popularity, optimization.

90 / 100

Excellent listing optimization

Biggest win: Rating quality

Update recency 100/100
WP compatibility 100/100
Rating quality 58/100
Listing tuning 100/100

To rank higher: Too few reviews to rank on quality — nudge happy users to leave one.

Get the full rank-higher report →

Daily downloads

Since 2022-10-05 · 1,424 days · wp.org + Plugin Pulse archive

-41% vs prior 30d
11Downloads · Aug 26

30-day downloads

Rolling 30-day volume · peaks are release surges

290

now · peak 746

30130d downloads · Aug 26

Directory rank vs rivals

wp.org popularity rank over time · higher is better · when a rival's line climbs above yours, they've overtaken you

Host Header Injectio · #9381 you WP Hide & Security E · #731 Disable auto-update · #1025 Customize WordPress · #1038

Update activity

How busy the existing users are, measured as downloads in the last 30 days for every 1,000 active sites. A spike means a new release everyone's pulling; a long, slow decline means an aging user base that updates less.

753per 1k installs · Aug 26

Release cadence

Actively maintained
from wp.org release tags

How often this plugin actually ships. A steady rhythm is the maintenance signal a single "last updated" date can't show.

4

releases in the last 12 months

1mo ago

latest release · v3.7

29

tagged releases on record

Recent releases

3.7 · 1mo ago3.6 · 4mo ago3.5 · 5mo ago3.4 · 10mo ago3.3 · 1.4y ago3.2 · 1.9y ago3.1 · 2.2y ago3.0 · 2.5y ago2.9 · 2.8y ago2.8 · 3.1y ago2.7 · 3.5y ago2.6.1 · 3.9y ago2.6 · 4.3y ago2.5 · 4.6y ago

What its installed base runs

via wordpress.org

Share of active installs on each version of this plugin. Green is the current release; a big slice on older versions is a user base that has stopped updating.

v3.6 61%
v3.3 11%
v3.5 5.2%
Older / other versions 23%

Estimated active installs

The public count shows “400+”. Our estimate pins where the real number sits.

modeled estimate
400–500 ≈460

Modeled within the band wp.org reports; tightens as we track daily.

Install history · since 2020-10-25 · 1,422 observations

400Installs · Aug 26

Estimated value

What this plugin might earn a year, and what it might sell for. Modeled from public signals; we don't see anyone's books.

Est. annual revenue

N/A

Est. acquisition value

N/A

No paid tier is visible, so we don't put a figure on revenue or sale value: that would be guessing. The install base is a real asset to an acquirer, just not one public data lets us price. A small install base leaves thin data to model from. A declining trend compresses what a buyer would pay.

Ratings · 6 reviews

Read on wp.org ↗
5★
6 4★
0 3★
0 2★
0 1★
0

Details

Version
3.7
Last updated
1mo ago
Added
2017-11-06 · 8 yrs old
Requires WP
4.7
Tested up to
7.1
Requires PHP
5.6.20
Changelog ↗Support forum ↗Reviews ↗Advanced stats ↗

Behavioral tests

via WP Hive

Automated install-time checks, tested on PHP 8.1.12 · WP 7.0.1

✓ Low memory footprint
✓ Low page-speed impact
✓ Runs on latest PHP + WP
✓ No PHP errors
✓ No JS errors
✓ Activates cleanly
✓ No resource errors
✓ No external HTTP errors
✓ Optimized database use
✕ Frequently updated

Languages

via translate.wordpress.org

Translated into 2 languages, 1 at 90% or more

Dutch 100%
Italian 45%

Growth timeline

Install-tier crossings we have observed, and how long each tier took to outgrow

  1. 2026-08-18 500+ → 400+ down after 19 days in tier
  2. 2026-07-30 400+ → 500+ up after 2 days in tier
  3. 2026-07-28 500+ → 400+ down after 5 days in tier
  4. 2026-07-23 400+ → 500+ up after 1 days in tier
  5. 2026-07-22 500+ → 400+ down after 2 days in tier
  6. 2026-07-20 400+ → 500+ up after 86 days in tier
  7. 2026-04-25 500+ → 400+ down after 171 days in tier
  8. 2025-11-05 600+ → 500+ down after 155 days in tier

Competes with

The plugins that solve the same job, ranked by shared tags then reach, closest match first. The letter on the right is each plugin's health grade (A best, F worst).

Compare head to head →

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Host Header Injection Fix: 400+ active installs, 5.0★ (6 reviews). Plugin Pulse (WP Mayor), as of 2026-08-28. https://plugins.wpmayor.com/plugin/host-header-injection-fix