CVE-2026-13178 in Eventin Plugin
Summary
by MITRE • 07/30/2026
The Eventin WordPress plugin before 4.1.16 does not properly authorize order creation and accepts an attacker-supplied order status, allowing unauthenticated users to create orders marked as paid without completing any payment.
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Analysis
by VulDB Data Team • 07/30/2026
The Eventin WordPress plugin vulnerability represents a critical authorization flaw that undermines the integrity of order processing within the e-commerce ecosystem. This issue affects versions prior to 4.1.16 and stems from insufficient access controls during the order creation process, allowing malicious actors to bypass legitimate authentication mechanisms entirely. The vulnerability manifests when the plugin fails to validate user permissions before accepting order data submissions, creating an exploitable pathway for unauthorized individuals to manipulate transaction states.
The technical implementation of this flaw involves the plugin's order handling mechanism failing to enforce proper authentication checks during the order creation endpoint. Attackers can submit specially crafted requests containing arbitrary order status values, including paid or completed states, without requiring valid user credentials or payment processing validation. This vulnerability specifically targets the plugin's order management API functions that accept external input for order status fields. The system accepts these attacker-supplied parameters without proper authorization verification, effectively allowing unauthenticated users to mark any order as paid within the plugin's database.
From an operational perspective, this vulnerability enables significant financial impact and business disruption for affected WordPress sites utilizing the Eventin plugin. An attacker can create fraudulent orders that appear as legitimate paid transactions within the system, potentially leading to inventory discrepancies, revenue loss, and compromised customer trust. The unauthorized order creation capability undermines the fundamental security assumptions of e-commerce platforms, as it allows malicious actors to manipulate transaction records without completing actual payment processing. This vulnerability particularly affects sites where the plugin manages ticket sales or event registrations, creating opportunities for financial fraud and operational chaos.
The security implications extend beyond immediate financial loss to encompass broader system integrity concerns and compliance violations. Organizations using vulnerable versions may face regulatory scrutiny for inadequate access controls and improper authorization mechanisms in their e-commerce infrastructure. This flaw aligns with CWE-285, which addresses improper authorization issues in software systems, and corresponds to ATT&CK technique T1078 related to valid accounts and credential access. The vulnerability demonstrates poor input validation practices and insufficient privilege enforcement within the plugin's architecture.
Mitigation strategies should prioritize immediate patching of affected versions to 4.1.16 or later, which contains the necessary authorization fixes. System administrators must also implement additional monitoring controls to detect unusual order creation patterns and unauthorized status modifications. Network-level restrictions can be applied to limit access to the vulnerable endpoints, while enhanced logging should capture all order management activities for forensic analysis. Organizations should conduct comprehensive security assessments of their WordPress installations to identify other potential authorization flaws, particularly in plugins that handle financial transactions or user data processing. The fix implemented in version 4.1.16 addresses the core issue by enforcing proper authentication checks before accepting any order status modifications from external sources.
This vulnerability highlights the importance of rigorous input validation and access control implementation in web applications, particularly those handling financial transactions. The flaw demonstrates how seemingly minor authorization gaps can create substantial security risks in e-commerce platforms, emphasizing the need for comprehensive security testing and regular vulnerability assessments. Organizations must maintain up-to-date software versions and implement defense-in-depth strategies to protect against similar authorization bypass vulnerabilities in their digital infrastructure.