CVE-2026-27432 in Rentals Plugin
Summary
by MITRE • 09/04/2026
Authorization Bypass Through User-Controlled Key vulnerability in sc Internet Vivoo WP Rentals allows Exploiting Incorrectly Configured Access Control Security Levels.
This issue affects WP Rentals: from n/a before 3.16.0.
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Analysis
by VulDB Data Team • 09/04/2026
The vulnerability identified as an authorization bypass through user-controlled key represents a critical failure in access control mechanisms within the sc Internet Vivoo WP Rentals plugin for WordPress. This flaw allows attackers to manipulate input parameters that serve as keys or identifiers for resource lookup, thereby circumventing intended security restrictions. The core technical issue stems from insufficient validation of these user-supplied inputs before they are used to determine access permissions. In many web applications, including those built on the WordPress framework, developers often rely on client-side controls or simple server-side checks that assume the integrity of provided identifiers. When an application fails to verify whether a specific user has legitimate ownership or administrative rights over a resource identified by such a key, it creates a pathway for unauthorized access. This type of vulnerability is fundamentally rooted in improper privilege management and reflects a lack of robust object-level authorization checks.
From a technical perspective, the exploitation vector typically involves modifying request parameters that reference internal database records or file paths. By altering these keys to point to resources belonging to other users or sensitive system components, an attacker can perform actions they are not authorized to execute. This might include viewing private rental listings, editing user profiles, accessing financial data, or even executing administrative functions depending on the specific implementation details of the plugin's codebase. The vulnerability is particularly dangerous because it does not require complex injection techniques; instead, it relies on simple parameter tampering that can be automated using standard web proxies like Burp Suite or OWASP ZAP. This ease of exploitation significantly lowers the barrier to entry for malicious actors seeking to compromise WordPress sites running this specific plugin version.
The operational impact of this vulnerability is severe, potentially leading to data breaches and unauthorized modifications within the WordPress environment. Since WP Rentals deals with sensitive information such as tenant details, payment histories, and property management configurations, an authorization bypass can result in significant financial loss and reputational damage for site administrators. Attackers could scrape large volumes of personal identifiable information (PII) from multiple users by iterating through sequential or predictable keys. Furthermore, if the vulnerability extends to administrative functions, it could allow full compromise of the WordPress installation, leading to defacement, malware injection, or use of the server as part of a botnet. The lack of proper access control enforcement means that even authenticated users might be able to escalate their privileges beyond what was originally granted by the system's role hierarchy.
This vulnerability aligns closely with CWE-284, which describes Improper Access Control, and specifically relates to CWE-639 regarding Authorization Bypass Through User-Controlled Key. In terms of offensive security frameworks, this behavior maps directly to MITRE ATT&CK technique T1078, Valid Accounts, where attackers leverage legitimate credentials but exploit flawed logic to access unauthorized resources. It also touches upon T1548, Abuse Elevation Control Mechanism, if the bypass allows privilege escalation from a standard user role to an administrator role. Understanding these mappings helps security professionals prioritize remediation efforts and align their defensive strategies with industry-standard threat models.
To mitigate this vulnerability, immediate action is required by updating the sc Internet Vivoo WP Rentals plugin to version 3.16.0 or later, where the issue has been addressed through improved input validation and stricter access control checks. Developers should implement server-side authorization verification for every resource request, ensuring that the current user's identity matches the owner of the requested object before granting access. This involves checking database records against session tokens rather than trusting client-supplied identifiers alone. Additionally, implementing rate limiting on API endpoints can help mitigate automated enumeration attacks that exploit predictable key patterns. Security teams should also conduct regular code reviews focusing on authorization logic and employ static application security testing (SAST) tools to detect similar flaws in future development cycles. Regular monitoring of access logs for anomalous patterns related to resource ID manipulation is recommended as a defensive measure while patches are being deployed across affected environments.