What’s Vulnerable › Vulnerabilities

CVE-2025-14548: Calendar <= 1.3.16 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'event_desc'

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-23 · updated 2026-10-19
• Weakness: CWE-79

Description

The Calendar plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'event_desc' parameter in all versions up to, and including, 1.3.16 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page, granted they can convince an administrator to enable lower privilege users to manage calendar events via the plugin settings.

Affected products

• kieranoshea Calendar: through 1.3.16

References

• https://plugins.trac.wordpress.org/browser/calendar/trunk/calendar.php#L2154
• https://plugins.trac.wordpress.org/browser/calendar/trunk/calendar.php#L899
• https://plugins.trac.wordpress.org/changeset?new=3419088%40calendar%2Ftrunk&old=3122280%40calendar%2Ftrunk
• https://www.wordfence.com/threat-intel/vulnerabilities/id/2e61489d-a433-4d44-bb12-8c84204922b9?source=cve

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