Eventin <= 4.0.31 - Authenticated (Contributor+) PHP Object Injection

7.5
Deserialization of Untrusted Data
CVE CVE-2025-49869
CVSS 7.5 (High)
Publicly Published August 13, 2025
Last Updated August 19, 2025
Researcher Nguyen Ngoc Quang Bach (maysbachs)

Description

The Eventin plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 4.0.31 via deserialization of untrusted input. This makes it possible for authenticated attackers, with contributor-level access and above, 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.

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Vulnerability Details for Eventin – Event Calendar, Tickets, Registration, Booking & WooCommerce

Software Type Plugin
Software Slug wp-event-solution (view on wordpress.org)
Patched? Yes
Remediation Update to version 4.0.32, or a newer patched version
Affected Version
  • <= 4.0.31
Patched Version
  • 4.0.32

Recent vulnerabilities in Eventin – Event Calendar, Tickets, Registration, Booking & WooCommerce

# Title CVE ID CVSS Researchers Date
1 Event SOlution <= 4.1.18 - Authenticated (Customer+) Information Exposure CVE-2026-28174 4.3 VanTastic August 13, 2026
2 Eventin – Event Calendar, Tickets, Registration, Booking & WooCommerce < 4.1.20 - Authenticated (Contributor+) Information Exposure CVE-2026-13177 4.3 Meher Sudhakar Abbireddi August 13, 2026
3 Eventin – Event Calendar, Tickets, Registration, Booking & WooCommerce < 4.1.20 - Authenticated (Contributor+) Information Exposure CVE-2026-13168 4.3 Muni Nitish Kumar Yaddala August 13, 2026
4 Eventin – Event Calendar, Tickets, Registration, Booking & WooCommerce < 4.1.20 - Unauthenticated User Account Creation CVE-2026-13171 5.3 Sanjorn Keeratirungsan August 10, 2026
5 Eventin <= 4.1.19 - Authenticated (Editor+) Local File Inclusion CVE-2026-13170 6.6 Meher Sudhakar Abbireddi August 6, 2026
6 Eventin – Event Calendar, Tickets, Registration, Booking & WooCommerce <= 4.1.9 - Missing Authorization CVE-2026-66451 5.3 Evan NR August 5, 2026
7 Eventin – Event Calendar, Tickets, Registration, Booking & WooCommerce < 4.1.16 - Unauthenticated Payment Bypass CVE-2026-13178 5.3 Haitam Lazaar August 4, 2026
8 Eventin <= 4.1.15 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'etn_faq_content' Parameter CVE-2026-12924 6.4 Wordfence PRISM July 9, 2026
9 Eventin 4.0.26 - 4.1.15 - Missing Authorization to Unauthenticated Payment Bypass via REST API CVE-2026-13039 5.3 Niv Kochan July 9, 2026
10 Eventin – Event Calendar, Event Registration, Tickets & Booking (AI Powered) <= 4.1.12 - Missing Authorization CVE-2025-68045 5.3 l3m3s June 15, 2026

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