CVE-2023-41238 in Social Media & Share Icons Plugin
Summary
by MITRE • 10/25/2023
Unauth. Reflected Cross-Site Scripting (XSS) vulnerability in UltimatelySocial Social Media Share Buttons & Social Sharing Icons plugin
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Analysis
by VulDB Data Team • 10/25/2023
The CVE-2023-41238 vulnerability represents a critical unauthenticated reflected cross-site scripting flaw discovered in the UltimatelySocial Social Media Share Buttons & Social Sharing Icons WordPress plugin. This vulnerability exists within the plugin's handling of user input parameters, specifically in the way it processes and reflects data back to users without proper sanitization or validation. The flaw allows attackers to inject malicious scripts into web pages viewed by other users, making it particularly dangerous for content management systems where multiple users interact with shared interfaces.
The technical implementation of this vulnerability stems from insufficient input validation and output encoding within the plugin's core functionality. When users navigate to specific URLs that contain malicious payloads in query parameters, the plugin fails to properly sanitize these inputs before rendering them in the browser context. This creates a reflected XSS vector where an attacker can craft malicious URLs that, when clicked by unsuspecting users, execute arbitrary JavaScript code within the victim's browser session. The vulnerability affects the plugin's social sharing functionality where user-generated content or configuration parameters are directly incorporated into web responses without adequate security controls.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform session hijacking, steal user credentials, manipulate web page content, or redirect users to malicious sites. Given that WordPress plugins often have broad access to user data and site functionality, an attacker could potentially leverage this vulnerability to escalate privileges or access sensitive information. The unauthenticated nature of the flaw means that no prior login credentials are required to exploit the vulnerability, making it particularly attractive to threat actors seeking to compromise WordPress installations at scale. This vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws in web applications.
Security implications of this vulnerability are significant for WordPress administrators and site owners who rely on the UltimatelySocial plugin for social media integration. The reflected nature of the vulnerability means that exploitation requires social engineering to convince users to click malicious links, but once executed, the consequences can be severe. Attackers can craft payloads that appear legitimate to users, making detection more difficult. The vulnerability demonstrates poor security practices in input handling and output encoding that violates fundamental web application security principles. Organizations should consider this flaw in their risk assessment frameworks as it represents a clear pathway for malicious actors to compromise user sessions and potentially gain deeper access to WordPress installations.
Mitigation strategies should include immediate plugin updates from the vendor, implementing web application firewalls to detect and block suspicious input patterns, and conducting thorough security audits of all installed plugins. Administrators should also consider implementing content security policies to limit script execution and regularly monitor their WordPress installations for unauthorized modifications. The vulnerability underscores the importance of maintaining updated security practices and highlights the critical need for proper input validation and output encoding in all web application components. Organizations should also consider adopting automated security scanning tools to identify similar vulnerabilities in their web applications and implement security training for developers to prevent such flaws in future code implementations.