CVE-2026-48197 in Capabilities Plugin
Summary
by MITRE • 10/06/2026
Incorrect Privilege Assignment vulnerability in PublishPress PublishPress Capabilities capability-manager-enhanced allows Privilege Escalation.This issue affects PublishPress Capabilities: from n/a through 2.45.0.
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Analysis
by VulDB Data Team • 10/06/2026
The identified security flaw represents a critical failure in access control mechanisms within the PublishPress Capabilities plugin for WordPress, specifically affecting versions up to and including 2.45.0. This vulnerability stems from an incorrect privilege assignment logic that allows users with lower-level permissions to perform administrative actions or modify capability settings intended exclusively for higher-privileged roles such as administrators. In a typical WordPress environment, the principle of least privilege dictates that user capabilities must be strictly segregated based on their assigned role hierarchy. However, in this instance, the application fails to properly validate whether the initiating request originates from an authorized source with sufficient rights before executing sensitive operations related to capability management. This misconfiguration effectively bypasses the intended security boundaries established by the platform's native permission system.
From a technical perspective, the root cause lies in insufficient server-side validation of user roles during the execution of functions associated with the capability-manager-enhanced module. When an authenticated user attempts to modify plugin settings or alter role capabilities, the application does not adequately verify that the current session possesses the necessary administrative privileges required for such modifications. This oversight allows a malicious actor who has obtained access to any account on the compromised site, regardless of its assigned role level, to escalate their privileges. By exploiting this flaw, an attacker can manipulate internal configuration tables or hooks to grant themselves elevated permissions, thereby gaining control over critical aspects of the website's functionality and content management structure.
The operational impact of this vulnerability is severe, as it directly facilitates privilege escalation attacks that compromise the integrity and confidentiality of the entire web application. Once an attacker successfully exploits this flaw, they can transition from a low-privileged user to an administrator without needing valid credentials for such high-level access. This unauthorized elevation enables the execution of arbitrary code, modification of site configurations, injection of malicious scripts into posts or pages, and potentially full server compromise if combined with other vulnerabilities in the underlying WordPress installation or hosting environment. The ability to alter capabilities also means that attackers can create new administrative accounts, ensuring persistent access even after initial detection attempts by administrators who may not be aware of their compromised status due to the stealthy nature of privilege escalation techniques.
This vulnerability aligns closely with CWE-269, which describes Improper Privilege Assignment, where a user is granted more privileges than they should have for normal operations. Furthermore, in terms of offensive security frameworks such as MITRE ATT&CK, this flaw supports tactics related to Persistence and Privilege Escalation, specifically techniques like Account Manipulation or Create Account, allowing adversaries to maintain footholds within the system by creating backdoor accounts with elevated rights. The lack of proper authorization checks also reflects weaknesses in input validation regarding user context, which is a common vector for exploitation in content management systems that rely heavily on role-based access control models.
To mitigate this risk, immediate action must be taken to update the PublishPress Capabilities plugin to version 2.45.1 or later, where these permission checks have been corrected and validated against strict administrative requirements. Organizations relying on older versions should consider temporarily disabling the affected module if an upgrade is not immediately feasible, although complete removal of the plugin may be necessary depending on its criticality to operations. Additionally, implementing a Web Application Firewall can provide an additional layer of defense by monitoring for anomalous requests that attempt to modify capability settings from non-administrative sources. Regular security audits and penetration testing should also be conducted to identify similar misconfigurations in other plugins or custom code within the WordPress ecosystem, ensuring that all components adhere to strict privilege separation principles.