Calendar

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 · 97% run the current release. 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. A small install base leaves thin data to model from.

Recent releases and news for this plugin

1. — Version 1.3.18 Fixed XSS issue with event link 1.3.18
2. — Version 1.3.17 Fixed CVE-2025-14548 Checked compatibility with WordPress 6.9 Corrected missing domain on some i18n calls Updated POT file for translations Achieved green check on latest Plugin Check version (1.7) Hook add_calendar_entr 1.3.17
3. — Version 1.3.16 Fixed error on event save for some users; Attempt to assign property “event_title” on null Fixed DB error when attempting to display a calendar with a limited number of categories Ensured the version of calendar is corre 1.3.16
4. — Version 1.3.15 Fixed CVE-2024-2831 Refactored DB calls to increase code re-use, improve auditability and harden security Comprehensive review and refactor of all variable reads, writes and sanitising Brought code and comments up to lat 1.3.15
5. — Version 1.3.14 Correcting CSS that was inadvertently overriding wider site elements Removed use of date_i18n – this changed in WordPress 5.3 and now causes undesired operation on upcoming events Enhanced use of CSS colours; added backg 1.3.14
6. — Version 1.3.13 Fixed loading order issue with internationalisation Enabled the full 30 characters in the title, even for unicode Fix ability to add basic HTML (line breaks etc.) into event descriptions Validated performance and compati 1.3.13

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

1. Medium · 6.4 Calendar <= 1.3.17 - Authenticated (Contributor+) Stored Cross-Site Scripting ↗
   2026-07-06 CVE-2026-14827 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Affects <= 1.3.17 Patched in 1.3.18
2. Medium · 6.4 Calendar <= 1.3.16 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'event_desc' ↗
   2025-12-22 CVE-2025-14548 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Affects <= 1.3.16 Patched in 1.3.17
3. High · 8.8 Calendar <= 1.3.14 - Authenticated (Contributor+) SQL Injection via Shortcode ↗
   2024-04-29 CVE-2024-2831 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') Affects <= 1.3.14 Patched in 1.3.15
4. Medium · 5.4 Calendar <= 1.3.10 - Authenticated Stored Cross-Site Scripting ↗
   2018-10-30 CVE-2018-18872 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Affects < 1.3.11 Patched in 1.3.11
5. High · 7.1 Calendar < 1.3.8 - Reflected Cross-Site Scripting ↗
   2016-11-08 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Affects < 1.3.8 Patched in 1.3.8
6. Medium · 4.3 Calendar <= 1.3.2 - Cross-Site Request Forgery ↗
   2014-08-01 CVE-2013-2698 Cross-Site Request Forgery (CSRF) Affects <= 1.3.2 Patched in 1.3.3

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

Translated into 134 languages, 5 at 90% or more

Plus 110 more locales with partial translations.

Growth timeline

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

1. 2026-02-18 5K+ → 4K+ down after 326 days in tier
2. 2025-03-29 6K+ → 5K+ down after 4 days in tier
3. 2025-03-25 5K+ → 6K+ up after 1 days in tier
4. 2025-03-24 6K+ → 5K+ down after 296 days in tier
5. 2024-06-01 7K+ → 6K+ down after 245 days in tier
6. 2023-09-30 8K+ → 7K+ down after 162 days in tier
7. 2023-04-21 9K+ → 8K+ down after 164 days in tier
8. 2022-11-08 10K+ → 9K+ 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).

• F FT Calendar 100+ installs · 3.5★ · 4 shared tags D
• AM Events 90+ installs · 4.2★ · 3 shared tags D
• Event CLNDR 70+ installs · 4.3★ · 3 shared tags D
• The Events Calendar 600K+ installs · 4.2★ · 2 shared tags A
• Events Manager – Calendar, Bookings, Tickets, and more! 60K+ installs · 4.2★ · 2 shared tags B
• WP Event Manager – Events Calendar, Registrations, Sell Tickets with WooCommerce 20K+ installs · 4.0★ · 2 shared tags A

Embed this report card

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

Calendar: 4K+ active installs, 3.7★ (24 reviews). Plugin Pulse (WP Mayor), as of 2026-08-28. https://plugins.wpmayor.com/plugin/calendar