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CVE-2026-77187

MEDIUM 6.4 CVSS 3.1
Published
September 9, 2026
Last modified
September 11, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-79
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Description

The My Calendar – Accessible Event Manager plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'before' and 'after' Shortcode Attributes in all versions up to, and including, 3.8.3 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.

Affected WordPress components

  • My Calendar – Accessible Event Manager Plugin · my-calendar
    Confirmed match Active
    Up to and including 3.8.3
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • joedolson My Calendar – Accessible Event Manager — Up to and including 3.8.3

References

  • github.com https://github.com/joedolson/my-calendar/commit/89bbf7314fac84cdb89e520e8b7b6d69eee8dd3c
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.8.0/my-calendar-events.php#L1102
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.8.0/my-calendar-shortcodes.php#L358
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.8.0/my-calendar.php#L563
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/8c8beca2-d02b-4379-99e9-8090ef84ca6d?source=cve
  • nvd.nist.gov Official NVD record