CVE-2026-33591 in Server
Summary
by MITRE • 08/03/2026
A vulnerability in Wapt Server before version 2.6.1.17813 allows a remote unauthenticated attacker to bypass security restriction using a specially crafted packet and retrieve a valid session token for the targeted account.
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Analysis
by VulDB Data Team • 08/03/2026
This vulnerability represents a critical authorization bypass flaw in the Wapt Server authentication system that affects versions prior to 2.6.1.17813. The issue stems from improper validation of authentication requests where an attacker can craft malicious packets that exploit weaknesses in the session management mechanism. This allows unauthorized individuals to obtain valid session tokens without proper credentials, effectively circumventing the security controls designed to protect user accounts and system resources.
The technical implementation of this vulnerability involves the manipulation of network packets sent to the Wapt Server authentication endpoints. Attackers can construct specially crafted requests that exploit insufficient input validation and session token generation logic within the server software. The flaw typically manifests when the server fails to properly verify the authenticity of incoming requests or validate the integrity of session creation parameters. This weakness in the authentication flow creates a pathway for remote exploitation without requiring prior knowledge of valid credentials.
From an operational impact perspective, this vulnerability exposes organizations to significant security risks including unauthorized access to sensitive system resources, potential data breaches, and privilege escalation opportunities. The ability to retrieve valid session tokens means attackers can impersonate legitimate users and gain access to administrative functions or restricted data within the Wapt Server environment. This poses particular risk in environments where Wapt Server manages software deployment and configuration management across multiple systems.
The vulnerability aligns with CWE-287 which addresses improper authentication issues, and maps to ATT&CK technique T1078 for Valid Accounts and T1566 for Phishing. Organizations should implement immediate mitigations including updating to Wapt Server version 2.6.1.17813 or later, implementing network segmentation to limit access to authentication endpoints, and monitoring for suspicious authentication patterns. Additional protective measures include enabling multi-factor authentication where possible, implementing stricter session timeout policies, and conducting regular security assessments of authentication mechanisms.
Security teams should prioritize this vulnerability in their risk assessment frameworks due to its remote exploitability and the potential for privilege escalation. The lack of authentication requirements for exploitation makes this particularly dangerous as it can be leveraged by attackers from anywhere on the network without prior access credentials. Organizations relying on Wapt Server for software management and deployment should urgently evaluate their exposure and implement comprehensive monitoring solutions to detect anomalous authentication behavior that might indicate exploitation attempts.