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Calendar vulnerabilities

6 tracked advisories · slug calendar

Important: Calendar appearing in this catalog does not mean your website is affected. Exposure depends on your installed version. How SiteRespond intelligence works

Tracked advisories

6

Latest advisory

6 July 2026

CISA KEV matches

0

In this WordPress feed

WordPress slug

calendar

Plugin

What this means for Calendar

This catalog lists 6 known advisories affecting Calendar. The most recent was published on 6 July 2026. If you use this software, compare your installed version against the affected ranges on each advisory and update to a fixed release outside those ranges. SiteRespond Defence checks your actual installed version when the plugin is connected — listing here does not by itself mean your site is vulnerable.

Latest issues

  • Calendar <= 1.3.17 - Authenticated (Contributor+) Stored Cross-Site Scripting

    May allow attackers to run scripts in visitors' browsers or hijack admin sessions.

    Published 6 July 2026

  • Calendar <= 1.3.16 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'event_desc'

    May allow attackers to run scripts in visitors' browsers or hijack admin sessions.

    Published 22 December 2025

  • Calendar <= 1.3.14 - Authenticated (Contributor+) SQL Injection via Shortcode

    May allow attackers to read or modify database contents beyond intended access.

    Published 29 April 2024

Vulnerability types

  • Cross-site scripting4
  • SQL injection1
  • CSRF1

Authentication (inferred from titles)

  • Unauthenticated0
  • Authenticated4
  • Unspecified2

Advisory history

Known Calendar advisories published by month.

All advisories

Check whether your installed version is affected

SiteRespond Defence matches your installed Calendar version against this catalog when the Defence plugin is connected to your WordPress site.

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