WordPress plugin
Calendar security & vulnerabilities
No known unpatched vulnerabilities in the latest version
All 6 known vulnerabilities are fixed in the latest release. If you run an older version, update to null or newer.
- Critical0
- High2
- Medium4
- Low0
All Calendar vulnerabilities
| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting ≤1.3.17Update to 1.3.18 | CVE-2026-14827 | |
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting via 'event_desc' ≤1.3.16Update to 1.3.17 | CVE-2025-14548 | |
| High8.8 | Authenticated (Contributor+) SQL Injection via Shortcode ≤1.3.14Update to 1.3.15 | CVE-2024-2831 | |
| Medium5.4 | Authenticated Stored Cross-Site Scripting <1.3.11Update to 1.3.11 | CVE-2018-18872 | |
| High7.1 | Reflected Cross-Site Scripting <1.3.8Update to 1.3.8 | — | |
| Medium4.3 | Cross-Site Request Forgery ≤1.3.2Update to 1.3.3 | CVE-2013-2698 |
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting
≤1.3.17Update to 1.3.18
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting via 'event_desc'
≤1.3.16Update to 1.3.17
- High8.8Authenticated (Contributor+) SQL Injection via Shortcode
≤1.3.14Update to 1.3.15
- Medium5.4Authenticated Stored Cross-Site Scripting
<1.3.11Update to 1.3.11
- High7.1Reflected Cross-Site Scripting
<1.3.8Update to 1.3.8
- Medium4.3Cross-Site Request Forgery
≤1.3.2Update to 1.3.3
Calendar: common questions
Does Calendar have known vulnerabilities?
Yes. VulnCrest Radar lists 6 known vulnerabilities in Calendar: 2 high, 4 medium. None are known to affect version null.
How do I check which version of Calendar I run?
In wp-admin open Plugins → Installed Plugins; the version is shown under the name. Without admin access, our passive Check my site tool can often read it from public files.
What is the most recent Calendar vulnerability?
CVE-2026-14827, published Jul 6, 2026: Calendar <= 1.3.17 - Authenticated (Contributor+) Stored Cross-Site Scripting. Severity: Medium (CVSS 6.4).
Is any Calendar vulnerability listed in CISA KEV?
No. None of the known Calendar vulnerabilities is currently listed in the CISA KEV catalog.