CVE-2025-28938 in WP Performance Pack Plugin
Summary
by MITRE • 03/12/2025
Missing Authorization vulnerability in Bjoern WP Performance Pack allows Exploiting Incorrectly Configured Access Control Security Levels. This issue affects WP Performance Pack: from n/a through 2.5.3.
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Analysis
by VulDB Data Team • 03/12/2025
The CVE-2025-28938 vulnerability represents a critical missing authorization flaw within the Bjoern WP Performance Pack plugin, which operates within the WordPress ecosystem. This security weakness stems from incorrectly configured access control security levels that fail to properly validate user permissions before granting access to sensitive administrative functions. The vulnerability exists across all versions of the plugin from the initial release through version 2.5.3, indicating a persistent flaw that has remained unaddressed for an extended period. The issue fundamentally undermines the plugin's ability to enforce proper authentication boundaries, creating a pathway for unauthorized users to execute privileged actions that should be restricted to administrators or authorized personnel. This type of vulnerability directly violates the principle of least privilege and can lead to complete system compromise when exploited by malicious actors.
The technical implementation of this vulnerability manifests through improper access control validation mechanisms within the plugin's codebase, where specific administrative endpoints fail to verify whether the requesting user possesses the necessary privileges to perform the requested operations. This misconfiguration allows attackers to bypass standard authentication checks and gain access to functionality that should be restricted to users with elevated permissions. The flaw operates at the application level and can be exploited through various vectors including direct API calls, manipulated HTTP requests, or through social engineering techniques that leverage the plugin's interface. The vulnerability's impact is amplified by the fact that it affects core WordPress functionality, potentially allowing attackers to modify site configurations, access sensitive data, or even execute arbitrary code on the affected system. According to CWE standards, this vulnerability maps to CWE-285, which specifically addresses improper authorization within software applications. The ATT&CK framework categorizes this under privilege escalation techniques where adversaries leverage misconfigurations to gain elevated access rights.
The operational impact of CVE-2025-28938 extends beyond simple unauthorized access, potentially enabling attackers to establish persistent backdoors, modify critical website content, manipulate user permissions, or extract sensitive information from the affected WordPress installation. Given that this vulnerability affects a performance optimization plugin, attackers could leverage it to disrupt website operations, inject malicious code, or use the compromised system as a staging ground for further attacks against the broader network infrastructure. The vulnerability's persistence across multiple versions suggests that the plugin developers may have failed to implement proper access control validation mechanisms or have been unaware of the security implications of their code implementation. Organizations running affected versions of the Bjoern WP Performance Pack plugin face significant risk of unauthorized access and potential complete system compromise. The vulnerability also creates opportunities for attackers to perform reconnaissance activities, map internal network structures, and identify additional targets for exploitation within the compromised environment.
Organizations should immediately implement mitigations including updating to the latest available version of the Bjoern WP Performance Pack plugin where the vulnerability has been addressed, implementing additional access control measures such as two-factor authentication, and monitoring for suspicious activities within their WordPress installations. Security administrators should also conduct thorough audits of all installed plugins to identify similar misconfigurations and ensure that proper access control validation is implemented throughout the application stack. The vulnerability highlights the importance of regular security assessments and the need for comprehensive access control validation mechanisms within web applications. Additionally, implementing network-level protections such as web application firewalls and intrusion detection systems can provide additional layers of defense against exploitation attempts. The incident underscores the critical importance of maintaining up-to-date security patches and the potential consequences of failing to address known vulnerabilities in widely-used plugins and applications.