CVE-2020-36716 in WP Activity Log Plugin
Summary
by MITRE • 06/07/2023
The WP Activity Log plugin for WordPress is vulnerable to authorization bypass due to a missing capability check on the setup_page function in versions up to, and including, 4.0.1. This makes it possible for unauthenticated attackers to run the setup wizard (if it has not been run previously) and access plugin configuration options.
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Analysis
by VulDB Data Team • 04/09/2026
The WP Activity Log plugin for WordPress represents a critical security vulnerability identified as CVE-2020-36716, which demonstrates a fundamental flaw in access control mechanisms within the plugin's architecture. This vulnerability specifically affects versions up to and including 4.0.1, creating a significant risk for WordPress installations that rely on this logging and monitoring solution. The issue stems from an insufficient capability check within the setup_page function, which should have required administrative privileges to execute but instead allowed unauthorized access. This authorization bypass represents a classic security misconfiguration that undermines the principle of least privilege and demonstrates poor input validation practices.
The technical implementation of this vulnerability occurs through the setup_page function which fails to verify whether the requesting user possesses the necessary administrative capabilities before permitting access to the plugin's setup wizard and configuration options. This missing capability check creates an exploitable condition where any unauthenticated attacker can bypass the standard WordPress authentication requirements and gain access to sensitive plugin functionality. The vulnerability operates at the application layer and can be classified under CWE-285, which addresses improper authorization in software systems. This flaw allows attackers to perform unauthorized actions that should only be available to users with appropriate administrative privileges, effectively granting them control over the plugin's configuration and potentially the entire logging system.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it provides attackers with the ability to manipulate the plugin's core configuration settings and potentially establish persistent access points within the WordPress environment. When the setup wizard is accessible to unauthenticated users, attackers can configure logging parameters to their advantage, potentially hiding their malicious activities or redirecting logs to obscure their presence. This vulnerability also creates opportunities for attackers to modify plugin behavior, inject malicious code, or manipulate the logging infrastructure to interfere with legitimate security monitoring activities. The attack surface is particularly concerning because it affects the foundational security tools that organizations rely on for detecting and responding to threats, creating a scenario where the very mechanism meant to protect systems becomes a vector for compromise.
Organizations should immediately implement mitigations including updating to the latest version of the WP Activity Log plugin where this vulnerability has been patched, or implementing temporary workarounds such as restricting access to the plugin's setup pages through web server configuration or firewall rules. The remediation process should also involve conducting thorough security assessments of all WordPress installations to identify other plugins with similar authorization bypass vulnerabilities. Security teams should monitor for exploitation attempts through unusual access patterns in the plugin's configuration files and establish proper access controls that enforce strict capability checks for all administrative functions. This vulnerability aligns with ATT&CK technique T1078 which covers valid accounts and privilege escalation, and represents a clear example of how missing security controls in third-party plugins can create significant risks for WordPress environments. The incident underscores the importance of regular security audits and the necessity of maintaining up-to-date security patches across all components of web applications.