CVE-2018-0546 in WP All Import Plugin
Summary
by MITRE
Cross-site scripting vulnerability in WP All Import plugin prior to version 3.4.6 for WordPress allows an attacker to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 02/21/2023
The CVE-2018-0546 vulnerability represents a critical cross-site scripting flaw within the WP All Import WordPress plugin, affecting versions prior to 3.4.6. This vulnerability falls under the CWE-79 category of Cross-Site Scripting, specifically targeting the web application's input validation mechanisms. The vulnerability stems from insufficient sanitization of user-supplied data during the import process, creating an avenue for malicious actors to execute arbitrary scripts within the context of other users' browsers. The WP All Import plugin serves as a powerful tool for importing data into WordPress sites, making it a prime target for attackers seeking to exploit web applications. The unspecified vectors suggest that the vulnerability could potentially be triggered through multiple input points during the import operations, including but not limited to XML files, CSV data, or other import formats processed by the plugin. This type of vulnerability is particularly dangerous in WordPress environments where administrators and users may have varying privilege levels, as it could enable attackers to escalate their privileges or access sensitive information.
The technical exploitation of this vulnerability requires an attacker to craft malicious input that gets processed by the WP All Import plugin's import functionality. When the plugin handles user-supplied data without proper sanitization, it fails to validate or escape special characters that could be interpreted as HTML or JavaScript code. The vulnerability essentially allows attackers to inject malicious scripts that execute in the browsers of unsuspecting users who view the imported content or interact with the affected WordPress site. This could manifest through various attack vectors including file uploads, database imports, or even API calls that the plugin processes. The XSS nature means that successful exploitation could lead to session hijacking, credential theft, or redirection to malicious websites. The attack surface is particularly broad given that WordPress plugins often have elevated privileges and access to site data, making the impact of such vulnerabilities potentially severe.
The operational impact of CVE-2018-0546 extends beyond simple script injection, as it can compromise entire WordPress installations and user sessions. When attackers successfully exploit this vulnerability, they can execute persistent XSS attacks that may remain undetected for extended periods. The vulnerability affects not only the end users but also administrators who might be tricked into importing malicious data through seemingly legitimate import operations. This creates a significant risk for businesses relying on WordPress for their web presence, as the compromise could lead to data breaches, reputation damage, and potential regulatory compliance violations. The attack could be particularly devastating in environments where the plugin is used for regular data imports, as the attack surface expands with each import operation. Organizations using affected versions of the plugin are vulnerable to various attack scenarios including credential theft, malware distribution, and site defacement, all of which can result in substantial financial and operational losses.
Mitigation strategies for CVE-2018-0546 primarily focus on immediate remediation through plugin updates to version 3.4.6 or later, which contains the necessary security patches. System administrators should implement comprehensive monitoring of import operations and user activities to detect potential exploitation attempts. The implementation of Content Security Policy headers can provide additional protection against XSS attacks by restricting the sources from which scripts can be loaded. Input validation and sanitization should be enforced at multiple layers including application-level filtering, database input sanitization, and proper HTML escaping. Network-based protections such as web application firewalls can help detect and block malicious import attempts, though these should complement rather than replace proper patching. Organizations should also conduct regular security assessments of their WordPress installations and plugin ecosystems to identify and remediate similar vulnerabilities. The vulnerability underscores the importance of maintaining up-to-date security practices and following the principle of least privilege when configuring plugin permissions, ensuring that import operations have minimal access to system resources. Additionally, implementing proper security awareness training for users who perform import operations can help reduce the risk of social engineering attacks that might exploit this vulnerability.