CVE-2026-105888 in Event Tickets Plugin
Summary
by MITRE • 10/08/2026
Missing Authorization vulnerability in Liquid Web / StellarWP Event Tickets event-tickets allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Event Tickets: from n/a through 5.30.0.1.
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Analysis
by VulDB Data Team • 10/08/2026
The identified security flaw represents a critical failure in access control mechanisms within the Liquid Web and StellarWP Event Tickets plugin, specifically affecting versions ranging from initial releases up to version 5.30.0.1. This vulnerability is classified as a Missing Authorization issue, which fundamentally indicates that the application fails to properly verify whether an authenticated user has the necessary permissions to perform specific actions or access certain resources. In the context of web applications and content management systems like WordPress, this type of flaw allows attackers who have obtained valid credentials for low-privilege accounts, such as subscribers or contributors, to escalate their privileges by manipulating requests intended for administrative functions. The core technical deficiency lies in the server-side logic not enforcing strict checks on user roles before processing sensitive operations, thereby bypassing the intended security boundaries established by the application's role-based access control model.
From a technical perspective, this vulnerability enables an attacker to exploit incorrectly configured access control levels by sending crafted HTTP requests that target administrative endpoints or functions without possessing the requisite administrator privileges. Since Event Tickets handles ticket sales and event management data, which often includes sensitive customer information such as names, email addresses, payment details, and purchase histories, the ability of a lower-privileged user to execute these actions poses a severe risk. The attacker could potentially modify existing tickets, cancel purchases, view private attendee lists, or alter pricing structures without authorization. This lack of proper validation means that the application trusts client-supplied data regarding the intended action's context rather than verifying the requester's actual permissions against server-side policy definitions.
The operational impact of this vulnerability is significant for organizations relying on Event Tickets to manage events and process transactions. Unauthorized access to administrative features can lead to financial loss through fraudulent ticket cancellations or price manipulation, as well as substantial reputational damage due to data breaches involving personal identifiable information. Furthermore, the integrity of event management operations is compromised, potentially leading to logistical failures where attendees are not properly registered or charged incorrectly. The vulnerability also facilitates further attacks by providing an attacker with a foothold within the administrative interface, which can be leveraged for persistent access, malware installation, or lateral movement if other systems share credentials or trust relationships.
This issue aligns closely with CWE-284, Improper Access Control, and specifically maps to MITRE ATT&CK technique T1078, Valid Accounts, where attackers use legitimate credentials to gain unauthorized access to resources. It also relates to CWE-639, Authorization Bypass Through User-Controlled Key, if the vulnerability allows bypassing checks by manipulating identifiers associated with user roles or permissions. To mitigate this risk, administrators of affected systems must immediately upgrade Event Tickets to a version later than 5.30.0.1 where these authorization checks have been corrected and enforced properly at the server level. Additionally, implementing robust web application firewall rules can help detect and block anomalous requests that attempt to access administrative endpoints from non-administrative IP addresses or user agents. Regular security audits focusing on role-based access control configurations are recommended to ensure that no other plugins or custom code introduce similar vulnerabilities in the future.