CVE-2017-9062 in WordPress
Summary
by MITRE
In WordPress before 4.7.5, there is improper handling of post meta data values in the XML-RPC API.
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Analysis
by VulDB Data Team • 12/06/2022
The vulnerability identified as CVE-2017-9062 represents a critical security flaw in WordPress versions prior to 4.7.5, specifically within the XML-RPC API implementation. This vulnerability stems from inadequate validation and sanitization of post meta data values when processed through the XML-RPC interface, creating a potential attack vector that could be exploited by malicious actors to manipulate or extract sensitive information from WordPress installations. The issue affects the core functionality of WordPress by compromising the integrity of metadata associated with posts and pages, which forms a fundamental component of content management systems. The XML-RPC API serves as a communication protocol enabling external applications to interact with WordPress, making this vulnerability particularly concerning as it could be leveraged by attackers to perform unauthorized operations or gain elevated privileges within the system.
The technical flaw manifests in the improper handling of post meta data values during XML-RPC requests, where the system fails to adequately validate or sanitize input parameters before processing them. This lack of proper input validation creates opportunities for attackers to inject malformed data or manipulate existing metadata values in ways that could lead to unexpected behavior within the WordPress environment. The vulnerability specifically impacts how WordPress processes metadata associated with posts, potentially allowing for the execution of unintended operations or the exploitation of other related weaknesses. From a cybersecurity perspective, this represents a classic case of insufficient input validation that could enable various attack patterns including data manipulation, information disclosure, or privilege escalation depending on the specific implementation details and system configuration. The flaw operates at the application layer and could be exploited through malformed XML-RPC requests that bypass normal WordPress security controls.
The operational impact of CVE-2017-9062 extends beyond simple data corruption, potentially enabling attackers to perform unauthorized modifications to content, manipulate user permissions, or gain access to sensitive system information. Systems running vulnerable versions of WordPress become susceptible to attacks that could compromise the integrity of published content, affect user authentication mechanisms, or provide attackers with opportunities to escalate privileges within the WordPress environment. The vulnerability's exploitation could result in significant business disruption, reputational damage, and potential compliance violations, particularly in environments where content integrity and user data protection are paramount. Organizations relying on WordPress for content management, blogging platforms, or web applications that depend on XML-RPC functionality face substantial risk from this vulnerability, as it could be leveraged to undermine the security posture of entire web infrastructures. The impact is particularly severe given that XML-RPC is a standard feature in WordPress installations and is often enabled by default, making the attack surface more extensive than initially apparent.
Mitigation strategies for CVE-2017-9062 center on immediate patching of WordPress installations to version 4.7.5 or later, which includes the necessary code modifications to properly validate and sanitize post meta data values in XML-RPC requests. Organizations should also implement network-level restrictions to limit access to the XML-RPC endpoint where possible, particularly in environments where external access is not required. Security monitoring should be enhanced to detect unusual XML-RPC activity patterns that might indicate exploitation attempts, and administrators should conduct thorough security audits of their WordPress installations to identify any potential compromise indicators. Additionally, implementing proper access controls and authentication mechanisms for XML-RPC endpoints, disabling the feature entirely if not required, and maintaining up-to-date security configurations can significantly reduce the risk exposure. This vulnerability aligns with CWE-20, which addresses improper input validation, and could potentially map to ATT&CK techniques related to privilege escalation and data manipulation within web applications. Regular security assessments and vulnerability scanning should be implemented to ensure ongoing protection against similar issues in the WordPress ecosystem.