Stored Cross-Site Scripting in My Calendar Plugin for WordPress
CVE-2026-77187

6.4MEDIUM

Key Information:

Vendor

WordPress
Status
My Calendar – Accessible Event Manager
Vendor
CVE Published:
9 September 2026

What is CVE-2026-77187?

The My Calendar – Accessible Event Manager plugin for WordPress contains a vulnerability that allows for Stored Cross-Site Scripting (XSS) via the 'before' and 'after' Shortcode Attributes. This issue arises from inadequate input sanitization and output escaping measures. Authenticated attackers with contributor-level access or higher can exploit this vulnerability to insert arbitrary web scripts into pages. When users visit these compromised pages, the malicious scripts execute, potentially leading to unauthorized actions or data theft.

Affected Version(s)

My Calendar – Accessible Event Manager 0 <= 3.8.3

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/my-calendar/ta...
https://plugins.trac.wordpress.org/browser/my-calendar/ta...

CVSS V3.1

Score:
6.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Wordfence PRISM
.