CVE-2026-66686 in Plugins Garbage Collector Plugin
Summary
by MITRE • 08/06/2026
Unauthenticated Cross Site Request Forgery (CSRF) in Plugins Garbage Collector (Database Cleanup) <= 0.14 versions.
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Analysis
by VulDB Data Team • 08/06/2026
This vulnerability represents a critical security flaw in the Plugins Garbage Collector plugin for WordPress systems, specifically affecting versions 0.14 and earlier. The issue stems from the absence of proper authentication mechanisms within the database cleanup functionality, creating an exploitable condition that allows unauthorized users to manipulate the plugin's operations without requiring valid credentials. This type of vulnerability falls under the Common Weakness Enumeration category CWE-352, which specifically addresses Cross Site Request Forgery weaknesses in web applications.
The technical implementation of this flaw occurs when the plugin processes cleanup requests through endpoints that do not validate user authentication status or implement proper request origin verification. Attackers can craft malicious requests that target the plugin's database cleanup functions, potentially leading to unauthorized data deletion, modification of database structures, or execution of unintended administrative operations. The vulnerability operates at the application layer and exploits the trust relationship between the web application and its users, where legitimate administrative functions become accessible to unauthenticated parties.
The operational impact of this vulnerability extends beyond simple data corruption, as it can enable attackers to perform destructive operations on WordPress databases. An attacker could potentially delete critical plugin data, truncate important tables, or manipulate database configurations that affect the entire website functionality. This risk is particularly severe in environments where the plugin manages sensitive user data or system configuration information, as the unauthorized access could lead to complete system compromise or data loss. The vulnerability also creates opportunities for attackers to escalate privileges within the WordPress environment through manipulation of plugin-specific database operations.
Mitigation strategies should focus on implementing robust authentication controls and request validation mechanisms within the plugin code. The most effective approach involves adding proper user authentication checks before any cleanup operations are executed, ensuring that only authenticated administrators can access these functions. Additionally, implementing anti-CSRF tokens in all plugin endpoints and validating referer headers can significantly reduce exploitation risks. Organizations should also consider applying immediate patches or upgrading to versions 0.15 or later where the vulnerability has been addressed. Security monitoring should include detection of unauthorized cleanup requests and anomalous database operations that may indicate exploitation attempts. The ATT&CK framework categorizes this as a privilege escalation technique through web application vulnerabilities, specifically targeting the persistence and privilege escalation phases of an attack lifecycle. Regular security audits of WordPress plugins and adherence to secure coding practices can prevent similar vulnerabilities from emerging in future releases of the software ecosystem.
This vulnerability demonstrates the critical importance of implementing proper authentication controls even within specialized plugin functions that may seem innocuous or administrative in nature. The lack of basic access controls in database management operations creates a significant attack surface that can be exploited by threat actors with minimal technical expertise, making it essential for system administrators to maintain current plugin versions and conduct thorough security assessments of their WordPress environments.