CVE-2026-81796 in WP Travel Plugin
Summary
by MITRE • 09/10/2026
Unauthenticated Broken Authentication in WP Travel <= 12.0.3 versions.
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Analysis
by VulDB Data Team • 09/10/2026
The vulnerability identified as an unbroken authentication flaw within the WP Travel plugin, specifically affecting versions up to and including 12.0.3, represents a critical security deficiency that allows unauthorized actors to bypass intended access controls. This issue stems from insufficient validation of user credentials or session tokens during administrative operations, enabling attackers to gain elevated privileges without valid authorization. In the context of WordPress ecosystems, where plugins often extend core functionality with specialized features such as travel booking management and itinerary planning, a breach in authentication mechanisms can lead to complete compromise of the underlying content management system. The flaw typically manifests when specific endpoints or API calls within the plugin fail to enforce strict session verification before processing sensitive requests, thereby allowing malicious users to execute administrative actions under their own unprivileged accounts or through direct manipulation of HTTP parameters.
From a technical perspective, this vulnerability aligns closely with CWE-287, which describes Improper Authentication, and often intersects with CWE-306 regarding the Missing Authentication for Critical Function. The operational impact is severe because it effectively neutralizes the primary defense mechanism designed to protect administrative interfaces from unauthorized access. Attackers can exploit this weakness by crafting specific HTTP requests that target vulnerable endpoints within the WP Travel plugin structure. By omitting or manipulating session cookies, nonce values, or authentication headers, an adversary can perform actions such as creating new administrator accounts, modifying site configurations, injecting malicious code into pages and posts, or exfiltrating sensitive customer data stored in the database. This level of access grants full control over the website, facilitating further attacks including defacement, malware distribution, and use of the server for distributed denial-of-service operations or cryptomining activities.
The presence of this vulnerability is particularly concerning given the widespread adoption of WordPress as a platform for e-commerce and service-based businesses that rely on plugins like WP Travel to manage bookings and payments. The ability to bypass authentication means that even if strong passwords are employed by legitimate administrators, an attacker does not need to guess or crack these credentials. Instead, they can directly interact with administrative functions through automated scripts or manual exploitation tools available in public repositories such as Exploit-DB or GitHub. This significantly lowers the barrier to entry for low-skilled attackers and increases the volume of potential incidents against sites running affected versions. Furthermore, because many WordPress installations are hosted on shared hosting environments where multiple websites reside on a single server, compromising one site through this vulnerability can potentially lead to lateral movement across other services hosted on the same infrastructure if proper isolation measures are not in place.
Mitigation strategies must prioritize immediate remediation by updating the WP Travel plugin to version 12.0.4 or later, where these authentication checks have been properly implemented and validated. Site administrators should verify that all plugins are kept up-to-date with their latest releases from official repositories to ensure patches for known vulnerabilities are applied promptly. In addition to patching, implementing a Web Application Firewall can provide an additional layer of defense by filtering malicious traffic patterns associated with exploitation attempts before they reach the application logic. It is also advisable to enforce multi-factor authentication for all administrative accounts and restrict access to wp-admin directories using IP whitelisting where feasible. Regular security audits and vulnerability scanning should be conducted to identify any other potential weaknesses in the plugin ecosystem or server configuration that could compound the risk posed by this specific flaw.