CVE-2024-31421 in Popup Plugin
Summary
by MITRE • 04/15/2024
Missing Authorization vulnerability in supsystic Popup by Supsystic popup-by-supsystic.This issue affects Popup by Supsystic: from n/a through <= 1.10.27.
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Analysis
by VulDB Data Team • 04/02/2026
The CVE-2024-31421 vulnerability represents a critical missing authorization flaw within the Popup by Supsystic WordPress plugin, specifically impacting versions ranging from the initial release through version 1.10.27. This vulnerability resides in the plugin's access control mechanisms, where proper authentication checks are either absent or inadequately implemented, allowing unauthorized users to perform administrative actions that should be restricted to authorized personnel only. The flaw manifests in the plugin's backend functionality where users without proper privileges can potentially manipulate popup configurations, settings, and content management features that are typically reserved for administrators or users with elevated permissions.
The technical implementation of this vulnerability stems from inadequate input validation and privilege verification within the plugin's core code structure. When users interact with the popup management interfaces or submit requests through the plugin's administrative endpoints, the system fails to properly verify whether the requesting user possesses the necessary authorization levels to execute the requested operations. This missing authorization check creates a pathway for attackers to escalate their privileges or directly manipulate popup configurations, potentially leading to unauthorized content modification, data exposure, or even complete system compromise depending on the scope of functionality affected. The vulnerability aligns with CWE-863, which specifically addresses "Incorrect Authorization" conditions where the system fails to properly enforce access control policies.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it can enable attackers to manipulate the plugin's core functionality and potentially compromise the entire WordPress installation. An attacker exploiting this vulnerability could modify popup settings to redirect traffic to malicious sites, inject malicious code into popup content, or alter the plugin's behavior to facilitate further attacks. The affected popup configurations might also be used as a vector for more sophisticated attacks including cross-site scripting or other persistent threats that leverage the compromised plugin as a foothold for broader system infiltration. This vulnerability particularly affects WordPress environments where the Supsystic popup plugin is actively used for managing user interactions and promotional content.
Security professionals should immediately implement mitigation strategies including updating to the latest available version of the plugin where this vulnerability has been addressed, implementing additional access controls through WordPress security plugins, and monitoring for unauthorized modifications to popup configurations. The vulnerability also highlights the importance of regular security audits and proper authorization testing, particularly for plugins that handle user-facing content management. Organizations should consider implementing web application firewalls to monitor and block suspicious requests targeting the affected plugin endpoints. The ATT&CK framework categorizes this vulnerability under privilege escalation techniques where attackers leverage missing authorization controls to gain unauthorized access to system resources, making it a significant concern for organizations relying on WordPress-based content management systems. Additionally, the vulnerability underscores the necessity of maintaining up-to-date security practices and regularly reviewing plugin permissions to prevent unauthorized access to administrative functions.