The My Calendar – Accessible Event Manager plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 3.8.7. The public mcs GET parameter is reflected into post content unsanitized before WordPress core's doshortcode filter runs, allowing an unauthenticated attacker to inject a nested [mycalendar above=...] shortcode; mcgeneratecalendarnav() then splits the above attribute on commas and dispatches each element via calluserfunc() with no authentication, authorization, or callable allowlist check. This makes it possible for unauthenticated attackers to invoke arbitrary loaded PHP functions, enabling a call chain in which the shortcode $params array is passed to edituser() — which PHP coerces to integer 1 as the $userid argument — overwriting the credentials of the initial Administrator account (user ID 1) and granting the attacker full wp-admin access. Exploitation is trivially reachable via the plugin's auto-generated /my-calendar/ page, which is publicly accessible by default upon plugin activation.

Missing Authorization vulnerability in Joe Dolson My Tickets my-tickets allows Accessing Functionality Not Properly Constrained by ACLs.This issue affects My Tickets: from n/a through <= 2.0.9.

Insertion of Sensitive Information Into Sent Data vulnerability in Joe Dolson My Tickets my-tickets allows Retrieve Embedded Sensitive Data.This issue affects My Tickets: from n/a through <= 2.1.0.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Joe Dolson My Tickets allows Stored XSS. This issue affects My Tickets: from n/a through 2.0.22.

Authentication Bypass by Spoofing vulnerability in Joe Dolson My Tickets my-tickets allows Identity Spoofing.This issue affects My Tickets: from n/a through <= 2.1.1.

Missing Authorization vulnerability in Joe Dolson My Calendar my-calendar allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects My Calendar: from n/a through <= 3.6.16.