CVE-2026-24987 in WP System Log Plugin
Summary
by MITRE • 03/25/2026
Missing Authorization vulnerability in activity-log.com WP System Log winterlock allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects WP System Log: from n/a through <= 1.2.7.
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Analysis
by VulDB Data Team • 03/31/2026
The vulnerability identified as CVE-2026-24987 represents a critical missing authorization flaw within the WP System Log plugin for WordPress systems. This security weakness specifically impacts the winterlock component of the activity-log.com WP System Log plugin, creating a pathway for unauthorized access to system logs and administrative functions. The vulnerability exists in versions ranging from the initial release through version 1.2.7, indicating a prolonged window of exposure for affected systems. The flaw stems from incorrectly configured access control security levels that fail to properly validate user permissions before granting access to sensitive system information. This misconfiguration allows attackers to bypass normal authorization checks and gain access to system logs that should only be available to authorized administrators or users with appropriate privileges.
The technical nature of this vulnerability aligns with CWE-285, which addresses improper authorization within software systems. The flaw operates by failing to implement proper access control mechanisms that should verify user credentials and permissions before allowing access to protected resources. In the context of WordPress plugins, this typically involves insufficient validation of user roles and capabilities, particularly when dealing with administrative functions and system monitoring features. Attackers exploiting this vulnerability can potentially access detailed system activity logs, server information, and other sensitive data that should remain restricted to authorized personnel. The impact extends beyond simple information disclosure as it can provide attackers with valuable reconnaissance data about system configurations, user activities, and potential attack vectors.
From an operational perspective, this vulnerability creates significant risks for WordPress installations using the affected plugin version. The exposure allows unauthorized users to gain insights into system operations, user behavior patterns, and potential security weaknesses within the installation. This information can be leveraged to plan more sophisticated attacks or to identify additional vulnerabilities within the broader system infrastructure. The winterlock functionality, which is designed to monitor and log system activities, becomes a potential attack vector rather than a security enhancement. Organizations running affected systems face the risk of data breaches, system compromise, and potential regulatory violations depending on the nature of information contained within the system logs. The vulnerability's persistence across multiple versions suggests that administrators may have been unknowingly exposed to risks for extended periods.
Mitigation strategies for this vulnerability should prioritize immediate plugin updates to versions that address the authorization flaw. System administrators must ensure that all WordPress installations using the affected plugin are updated to the latest available version that contains proper access control mechanisms. Additionally, implementing network-level access controls and monitoring for unauthorized access attempts can help detect exploitation attempts. Security professionals should conduct comprehensive audits of all installed WordPress plugins to identify similar authorization issues and ensure that proper user role validation is implemented throughout the system. The vulnerability demonstrates the importance of regular security assessments and maintaining up-to-date software components to prevent exploitation of known authorization flaws. Organizations should also consider implementing principle of least privilege access controls and regular security monitoring to detect and respond to unauthorized access attempts effectively. This vulnerability serves as a reminder of the critical importance of proper access control implementation in web applications and the potential consequences of failing to validate user permissions before granting access to sensitive system resources.