CVE-2026-40802 in Pubjet Plugin
Summary
by MITRE • 10/10/2026
Subscriber Settings Change in Pubjet | پابجت <= 5.4.8 versions.
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Analysis
by VulDB Data Team • 10/10/2026
The vulnerability identified as Subscriber Settings Change in PubJet versions up to and including 5.4.8 represents a critical authorization flaw within the application's administrative interface, specifically targeting user account management functionalities. This issue stems from an improper implementation of access control mechanisms that fail to adequately verify whether the authenticated user initiating the request has the requisite privileges to modify subscriber settings for other accounts or specific configuration parameters. In many web applications utilizing PubJet as a push notification service provider, administrators are expected to manage bulk operations and individual user configurations securely. However, in this affected version, the backend logic does not strictly enforce role-based access control checks when processing requests intended to update subscriber attributes such as tags, status, or device tokens. This oversight allows an attacker who has obtained valid credentials for a lower-privileged account, or potentially even an unauthenticated actor if session management is also compromised, to manipulate settings that should be restricted to super-administrators or specific operational roles.
From a technical perspective, this flaw aligns with CWE-284 Improper Access Control and often intersects with CWE-639 Authorization Bypass Through User-Controlled Key if the vulnerability involves manipulating identifiers associated with subscriber records. The core of the issue lies in the server-side validation process where the application trusts client-supplied data regarding which user's settings are being modified without cross-referencing this against the permissions profile of the currently authenticated session. Consequently, an attacker can craft HTTP requests that alter critical configuration parameters for other subscribers or administrative accounts. This could involve changing notification preferences, disabling security alerts, or modifying access tokens associated with specific subscriber profiles. The lack of robust server-side authorization checks means that the application processes these modifications as legitimate actions performed by a privileged entity, thereby bypassing intended security boundaries designed to isolate user data and administrative functions.
The operational impact of this vulnerability is significant for organizations relying on PubJet for critical communication channels such as transactional alerts, marketing campaigns, or system notifications. By altering subscriber settings, an attacker can disrupt service availability for specific users by unsubscribing them from essential notification streams, leading to potential loss of business continuity and user trust. Furthermore, if the vulnerability allows modification of administrative configurations tied to subscriber accounts, it could facilitate further attacks such as privilege escalation. An adversary might use this access control bypass to elevate their own privileges within the application or compromise other users' data by altering settings that expose sensitive information. In a broader security context, this flaw contributes to an increased attack surface where lateral movement becomes feasible if multiple services are integrated with PubJet and share authentication states or tokens. The ability to silently modify subscriber configurations without detection can also hinder incident response efforts, as malicious changes may go unnoticed until significant damage has occurred.
Mitigation strategies for this vulnerability primarily involve upgrading the PubJet software to a version greater than 5.4.8 where these access control issues have been addressed by the vendor through rigorous code reviews and security patches. Organizations that cannot immediately upgrade should implement compensating controls such as strict input validation on all administrative endpoints, ensuring that server-side logic explicitly verifies user roles before processing any modification requests. Additionally, implementing multi-factor authentication for administrative accounts can reduce the risk of credential theft leading to exploitation of this flaw. Security teams should also monitor logs for anomalous patterns in subscriber setting changes, particularly those occurring outside normal operational hours or from unusual IP addresses. Integrating Web Application Firewalls with rules that detect and block requests attempting to manipulate user IDs or role parameters without proper authorization headers can provide an additional layer of defense. Regular security assessments and penetration testing focused on broken access control vulnerabilities are recommended to ensure ongoing resilience against such threats, aligning with MITRE ATT&CK techniques related to Account Manipulation and Privilege Escalation.