CVE-2026-19077 in Duplicate Post Plugin
Summary
by MITRE • 08/10/2026
The Duplicate Post WordPress plugin before 1.5.5 does not perform per-object authorisation checks in its bulk copy and delete operations, allowing any user whose role an administrator has granted Duplicate Post WordPress plugin before 1.5.5 access to permanently delete arbitrary posts on the site, including those belonging to other users.
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Analysis
by VulDB Data Team • 08/10/2026
The vulnerability in the Duplicate Post WordPress plugin prior to version 1.5.5 represents a critical authorization flaw that undermines the fundamental security model of content management systems. This issue stems from insufficient access control mechanisms within the plugin's bulk operations functionality, specifically affecting both copy and delete actions. The flaw allows authenticated users with minimal privileges to execute destructive operations across posts they should not have access to modify or remove. Such vulnerabilities directly violate the principle of least privilege and demonstrate poor implementation of user role management within WordPress plugin architecture.
The technical execution of this vulnerability occurs through the absence of proper per-object authorization checks during bulk operations. When users with granted plugin access attempt to perform copy or delete actions on posts, the system fails to validate whether the requesting user has legitimate permissions to modify or remove the specific content in question. This represents a classic authorization bypass vulnerability that can be categorized under CWE-285: Improper Authorization, which occurs when an application does not properly enforce access controls for operations that require elevated privileges. The flaw exists at the application logic level where the plugin assumes that any user with plugin access should have unrestricted rights to perform bulk operations across all posts within the system.
The operational impact of this vulnerability extends far beyond simple data loss scenarios, creating significant risks for content integrity and user privacy. Attackers can leverage this weakness to permanently delete posts belonging to other users, potentially causing irreparable damage to website content, business records, or personal information stored in blog posts. This capability enables malicious actors to disrupt services, destroy evidence of activities, or gain unauthorized access to sensitive information contained within posts created by other administrators or contributors. The vulnerability also creates potential for abuse in multi-user environments where different roles have distinct permission levels, as it allows privilege escalation through the manipulation of content management operations.
Organizations using affected versions of the Duplicate Post plugin face substantial security risks that require immediate attention and remediation. The vulnerability directly maps to tactics outlined in the ATT&CK framework under T1485: Data Destruction, where adversaries gain access to systems and perform destructive operations on data. Additionally, it aligns with T1078: Valid Accounts, as attackers can leverage legitimate user accounts with plugin access to execute unauthorized actions. The recommended mitigation strategy involves immediate upgrading to version 1.5.5 or later, which includes proper authorization checks for all bulk operations. Organizations should also implement additional monitoring of bulk content operations and consider role-based access restrictions to limit plugin functionality to users who genuinely require these capabilities. Security teams must conduct thorough audits of WordPress plugin configurations and ensure that all third-party plugins undergo regular security assessments to prevent similar authorization bypass vulnerabilities from compromising system integrity.