CVE-2024-4898 in InstaWP Connect Plugin
Summary
by MITRE • 06/12/2024
The InstaWP Connect – 1-click WP Staging & Migration plugin for WordPress is vulnerable to arbitrary option updates due to a missing authorization checks on the REST API calls in all versions up to, and including, 0.1.0.38. This makes it possible for unauthenticated attackers to connect the site to InstaWP API, edit arbitrary site options and create administrator accounts.
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Analysis
by VulDB Data Team • 06/14/2024
The vulnerability identified as CVE-2024-4898 affects the InstaWP Connect plugin for WordPress, specifically targeting versions up to and including 0.1.0.38. This plugin facilitates one-click WordPress staging and migration operations, making it a potentially attractive target for attackers seeking to compromise WordPress installations. The core issue stems from insufficient authorization validation within the plugin's REST API endpoints, creating a critical security gap that allows unauthenticated attackers to exploit the system. The vulnerability manifests through the absence of proper access controls during REST API interactions, enabling malicious actors to manipulate critical system configurations without proper authentication credentials.
The technical flaw resides in the plugin's implementation of REST API endpoints that handle option updates and administrative functions. Without proper authorization checks, any attacker capable of making REST API requests can manipulate WordPress site options, potentially modifying core system configurations that affect site functionality, security settings, and user management. This authorization bypass allows for arbitrary option updates that can fundamentally alter how the WordPress installation operates, including the ability to create new administrator accounts with full privileges. The vulnerability specifically impacts the plugin's ability to validate user identities before permitting modifications to system settings, creating an attack surface that directly contradicts fundamental security principles of access control.
The operational impact of this vulnerability is severe and multifaceted, as it provides attackers with complete control over compromised WordPress installations. Unauthenticated attackers can establish connections to the InstaWP API, effectively bypassing the intended security boundaries that should protect WordPress sites from unauthorized modifications. The ability to edit arbitrary site options means that attackers can modify critical WordPress configurations such as wp-config.php settings, plugin configurations, and core system parameters that could lead to complete site compromise. Furthermore, the capability to create administrator accounts provides persistent access to the compromised system, allowing attackers to maintain control over the WordPress installation indefinitely. This vulnerability essentially transforms the plugin from a legitimate site management tool into a weapon for unauthorized system access and control.
This vulnerability maps directly to CWE-863, which addresses "Incorrect Authorization" in software systems, and aligns with ATT&CK technique T1078.004 for Valid Accounts and T1566.001 for Phishing. The missing authorization checks create a pathway for privilege escalation attacks where attackers can gain elevated privileges without proper authentication. Organizations using affected plugin versions face significant risk of complete site compromise, data exfiltration, and potential use as a pivot point for attacking other systems within the network. The vulnerability's impact extends beyond immediate site compromise, as it can be leveraged to establish persistent backdoors, modify site content for malicious purposes, or use the compromised site as a launching point for broader attacks against connected systems. The severity is amplified by the fact that this vulnerability affects a widely used plugin, making it a prime target for automated exploitation attempts.
Mitigation strategies should prioritize immediate plugin updates to versions that address the authorization bypass issue, as developers have likely released patches to resolve the vulnerability. Organizations should also implement network-level restrictions to limit access to REST API endpoints, particularly those that handle sensitive operations like option updates and account creation. Security monitoring should be enhanced to detect unusual API activity patterns that might indicate exploitation attempts, including unexpected REST API calls to the affected endpoints. Additionally, administrators should conduct comprehensive security audits of their WordPress installations to identify any unauthorized changes that might have occurred during exploitation windows. Implementing proper input validation and output encoding practices, along with regular security assessments of third-party plugins, will help prevent similar vulnerabilities from being introduced into WordPress environments. The affected plugin should be temporarily deactivated until a secure version is installed, and organizations should consider implementing web application firewalls to provide additional protection against exploitation attempts targeting these specific API endpoints.