Simple Calendar – Google Calendar Plugin

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

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

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

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.

Refined from the date this plugin crossed into its current band.

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.

Recent releases and news for this plugin

1. — Version 4.0.7 Fix: Removed unnecessary Google API key/OAuth requirement when creating a Grouped Calendar. 4.0.7
2. — Version 4.0.6 Fix: Optimize admin & fronend performance, throttle OAuth token checks, and reduce redundant API calls. 4.0.6
3. — Version 4.0.5 Fix: Fixed a PHP 8.3 ValueError by replacing sprintf() with string concatenation to safely handle literal percent signs in translations. 4.0.5
4. — Version 4.0.4 Fix: Fixed text domain loading by hooking into init. Dev: Added validation before unserialize() to prevent errors during OAuth failures. 4.0.4
5. — Version 4.0.3 Dev: Ensured compatibility with WordPress 7.0. Fix: Trimmed historical changelog entries to resolve WordPress.org length warnings. Dev: Add an [if-event] conditional template tag Dev: Allow the url argument in the [link] 4.0.3
6. — Version 4.0.2 Dev: Added a new connect page in admin enhancing the onboarding experience. Dev: Redesigned settings and add-ons pages with a modern layout. 4.0.2

7 disclosed vulnerabilities on record for this plugin, all fixed in the current version. Sites on older versions stay exposed until they update.

1. Medium · 5.3 Google Calendar Events <= 3.5.9 - Unauthenticated Insecure Direct Object Reference ↗
   2025-12-18 CVE-2025-68979 Authorization Bypass Through User-Controlled Key Affects <= 3.5.9 Patched in 3.6.0
2. Medium · 6.1 Simple Calendar – Google Calendar Plugin <= 3.4.2 - Reflected Cross-Site Scripting ↗
   2024-09-24 CVE-2024-8549 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Affects <= 3.4.2 Patched in 3.4.3
3. Medium · 6.4 Google Calendar Events <= 3.2.7 - Authenticated (Contributor+) Stored Cross-Site Scripting via shortcode ↗
   2023-11-28 CVE-2023-49151 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Affects <= 3.2.7 Patched in 3.2.8
4. Medium · 4.3 Simple Calendar <= 3.2.4 - Cross-Site Request Forgery via duplicate_feed ↗
   2023-10-20 Cross-Site Request Forgery (CSRF) Affects < 3.2.5 Patched in 3.2.5
5. Medium · 4.3 Google Calendar Events <= 3.2.5 - Cross-Site Request Forgery via bulk_actions ↗
   2023-10-18 CVE-2023-46189 Cross-Site Request Forgery (CSRF) Affects <= 3.2.5 Patched in 3.2.6
6. Medium · 4.3 Simple Calendar <= 3.1.42 - Cross-Site Request Forgery to Transient Cache Clearing ↗
   2023-05-11 Cross-Site Request Forgery (CSRF) Affects <= 3.1.42 Patched in 3.1.43
7. Medium · 6.1 Simple Calendar – Google Calendar Plugin < 2.0.4 - Reflected Cross-Site Scripting ↗
   2014-10-08 CVE-2014-7138 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Affects < 2.0.4 Patched in 2.0.4

Automated install-time checks, tested on PHP 8.1.12 · WP 7.0

Translated into 130 languages, 1 at 90% or more

Plus 106 more locales with partial translations.

Growth timeline

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

1. 2025-06-08 60K+ → 50K+ down after 857 days in tier
2. 2023-02-02 70K+ → 60K+ down after 2 days in tier
3. 2023-01-31 60K+ → 70K+ up after 2 days in tier
4. 2023-01-29 70K+ → 60K+ down

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).

• Booking Manager – Sync WP Booking Calendar – Import Events, Export Bookings to ICS Calendar 5K+ installs · 3.9★ · 2 shared tags B
• Events Calendar for Google 2K+ installs · 4.1★ · 2 shared tags B
• Event Calendar – Calendar 2K+ installs · 4.6★ · 2 shared tags B
• Tockify Events Calendar 2K+ installs · 4.3★ · 2 shared tags A
• Simple Google Calendar Outlook Events Widget 1K+ installs · 4.3★ · 2 shared tags A
• Hydrogen Calendar Embeds 1K+ installs · 4.0★ · 2 shared tags B

Embed this report card

Drop a live Pulse card for Simple Calendar – Google Calendar Plugin into a readme, a review or a deck. It updates itself.

Simple Calendar – Google Calendar Plugin: 50K+ active installs, 3.8★ (397 reviews). Plugin Pulse (WP Mayor), as of 2026-08-25. https://plugins.wpmayor.com/plugin/google-calendar-events