CVE-2014-4590 in WP Microblogs
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in get.php in the WP Microblogs plugin 0.4.0 and earlier for WordPress allows remote attackers to inject arbitrary web script or HTML via the oauth_verifier parameter.
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Analysis
by VulDB Data Team • 03/08/2018
The CVE-2014-4590 vulnerability represents a critical cross-site scripting flaw within the WP Microblogs plugin for WordPress systems. This vulnerability specifically affects versions 0.4.0 and earlier, creating a significant security risk for WordPress sites that utilize this plugin. The flaw resides in the get.php script which fails to properly sanitize user input, particularly when processing the oauth_verifier parameter that is commonly used in OAuth authentication flows. The vulnerability is classified under CWE-79 as a failure to sanitize input, making it a classic XSS attack vector that can be exploited by remote attackers without requiring any privileged access or authentication.
The technical execution of this vulnerability occurs when an attacker crafts a malicious URL containing crafted script code within the oauth_verifier parameter and delivers it to a victim who is logged into a WordPress site using the vulnerable WP Microblogs plugin. When the victim clicks on the malicious link, the web application fails to properly escape or filter the input before rendering it in the browser context, allowing the injected script to execute within the victim's browser session. This creates a persistent threat where attackers can steal session cookies, redirect users to malicious sites, or perform actions on behalf of authenticated users.
The operational impact of this vulnerability extends beyond simple script injection, as it can be leveraged for more sophisticated attacks within the context of the compromised WordPress installation. Attackers can exploit this vulnerability to establish persistent backdoors, harvest sensitive user data, or manipulate the content displayed to authenticated users. The vulnerability is particularly dangerous because it operates within the legitimate authentication flow of the plugin, making it more difficult to detect and harder to distinguish from legitimate user activity. This aligns with ATT&CK technique T1566.001 for initial access through spearphishing attachments and T1059.001 for command and control through script injection.
Mitigation strategies for CVE-2014-4590 should prioritize immediate patching of the WP Microblogs plugin to version 0.4.1 or later, which contains the necessary input sanitization fixes. Organizations should also implement proper input validation at multiple layers including web application firewalls, content security policies, and regular security scanning of their WordPress installations. The remediation process should include comprehensive testing to ensure that the patched version does not introduce compatibility issues with existing WordPress configurations. Additionally, administrators should conduct regular security audits of all installed plugins and themes, as this vulnerability demonstrates the importance of keeping all WordPress components updated to prevent exploitation of known flaws. Network monitoring should be enhanced to detect unusual traffic patterns that might indicate exploitation attempts, and user education regarding suspicious links should be reinforced as part of a comprehensive security posture.