The EventPrime – Events Calendar, Bookings and Tickets plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 4.2.8.0 via deserialization of untrusted input. This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code.
CVE-2026-24378 is a high severity with CVSS 8.1 Vulnerability issue affecting the Plugin EventPrime – Events Calendar, Bookings and Tickets. It affects Versions up to 4.2.8.0 and is fixed in 4.2.8.1.
Use the related hub and response guides to connect this CVE-2026-24378 report with patch validation, scanner checks, and site hardening work.
Open the grouped hub for related CVEs, affected ranges, severity mix, and patch coverage.
Check access, XML-RPC exposure, backup readiness, and monitoring after patching.
Use containment, evidence capture, remediation, and validation steps when exploit risk is high.
CVE-2026-24378 is tracked for the Plugin EventPrime – Events Calendar, Bookings and Tickets as high severity with CVSS 8.1. The affected range is Versions up to 4.2.8.0. Update EventPrime – Events Calendar, Bookings and Tickets to 4.2.8.1 or newer where that version is compatible with the site.
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This report has a CVE identifier, which makes it suitable for focused search and vulnerability triage workflows.
Affected version data gives operators a concrete comparison point against installed WordPress software.
A fixed version is present, so the page can answer update and remediation intent directly.
External references are available for source validation, advisory review, and incident notes.
Use these checks when converting this record into a patch ticket, incident note, or risk acceptance decision.
Inventory the installed Plugin package and compare its version with Versions up to 4.2.8.0.
Confirm EventPrime – Events Calendar, Bookings and Tickets is updated to 4.2.8.1 or newer.
Review references and CVSS vector details for exploitability, authentication requirements, and exposure path.
After patching, re-run vulnerability monitoring and keep the related plugin or theme hub under review for follow-up CVEs.
| Software Type | Plugin |
|---|---|
| Software Slug |
eventprime-event-calendar-management
View on wordpress.org
|
| CVE | CVE-2026-24378 |
| Patched Versions |
4.2.8.1
|
| Affected Versions |
Versions up to 4.2.8.0
|
These internal links group the same WordPress plugin by CVE, issue type, severity, and patch status so operators and search engines can connect the full vulnerability cluster.
EventPrime – Events Calendar, Bookings and Tickets <= 4.3.2.1 - Unauthenticated PHP Object Injection
EventPrime – Events Calendar, Bookings and Tickets <= 4.0.7.3 - Unauthenticated Stored Cross-Site Scripting via Ticket Category and Ticket Type Name
EventPrime – Events Calendar, Bookings and Tickets <= 3.4.3 - Unauthenticated Stored Cross-Site Scripting
EventPrime – Events Calendar, Bookings and Tickets <= 3.4.2 - Missing Authorization to Arbitrary Post Overwrite
EventPrime – Events Calendar, Bookings and Tickets <= 4.3.2.1 - Authenticated (Subscriber+) Stored Cross-Site Scripting
EventPrime – Modern Events Calendar, Bookings and Tickets <= 4.0.4.7 - Unauthenticated Stored Cross-Site Scripting
EventPrime – Modern Events Calendar, Bookings and Tickets <= 4.0.4.7 - Unauthenticated Stored Cross-Site Scripting via Transaction Log
EventPrime <= 4.0.4.5 - Open Redirect
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