CVE-2026-35552 in UPVWebServices
Summary
by MITRE • 07/09/2026
In CAXperts UPVWebServices 2.4.2212.603 through 2.7.6 and UDiTH Portal 2026.0.0 through 2026.2.0, an authenticated remote user can invoke an administrative API endpoint intended for privileged users. Due to missing authorization checks, this allows the attacker to deactivate the application's license.
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Analysis
by VulDB Data Team • 07/09/2026
This vulnerability exists within CAXperts UPVWebServices and UDiTH Portal applications where an authenticated user can exploit a missing authorization mechanism to access administrative API endpoints that should only be available to privileged users. The flaw represents a classic privilege escalation issue that allows a regular authenticated user to perform administrative actions without proper authentication checks. The vulnerability affects versions ranging from 2.4.2212.603 through 2.7.6 for UPVWebServices and 2026.0.0 through 2026.2.0 for UDiTH Portal, indicating a widespread issue across multiple application releases. The specific administrative action that can be performed is deactivating the application's license, which represents a critical operational impact that could disrupt business continuity and potentially result in financial loss for organizations relying on these systems.
The technical implementation flaw stems from inadequate access control validation within the API endpoint handling logic. When an authenticated user makes a request to the administrative API endpoint, the system fails to verify whether the requesting user possesses the necessary privileges to perform the requested operation. This missing authorization check creates an access control vulnerability that directly maps to CWE-285, which specifically addresses insufficient authorization in software systems. The vulnerability allows for unauthorized privilege escalation through what should be restricted administrative interfaces, making it particularly dangerous as it enables attackers to perform operations that could severely impact system functionality and availability.
The operational impact of this vulnerability extends beyond simple license deactivation and represents a significant threat to organizational security posture. An attacker who gains access to any authenticated user account can essentially disable critical software licensing, potentially causing service outages, compliance violations, and requiring costly intervention to restore system functionality. This type of vulnerability aligns with ATT&CK technique T1078 which covers valid accounts and privilege escalation through unauthorized administrative access. The attack surface is particularly concerning because it requires only authentication credentials rather than additional exploit capabilities, making it accessible to threat actors who may have obtained legitimate user credentials through phishing, credential stuffing, or other social engineering techniques.
Organizations should implement immediate mitigations including strengthening authorization checks across all administrative API endpoints, implementing role-based access controls that properly validate user privileges before executing sensitive operations, and conducting comprehensive security reviews of all application interfaces. The fix should involve adding mandatory authorization validation to all administrative endpoints, ensuring that requests are authenticated against proper privilege levels before any operation is executed. Additionally, organizations should implement monitoring for unauthorized administrative API calls and establish incident response procedures for license deactivation events. This vulnerability demonstrates the critical importance of defense in depth and proper access control implementation, as it shows how a single missing authorization check can provide attackers with elevated privileges that could cause significant operational disruption and financial impact.