CVE-2023-0379 in Spotlight Social Feeds Plugin
Summary
by MITRE • 02/13/2023
The Spotlight Social Feeds WordPress plugin before 1.4.3 does not validate and escape some of its block options before outputting them back in a page/post where the block is embed, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks
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Analysis
by VulDB Data Team • 03/21/2025
The vulnerability identified as CVE-2023-0379 affects the Spotlight Social Feeds WordPress plugin version 1.4.2 and earlier, presenting a critical security risk through stored cross-site scripting flaws. This issue stems from insufficient input validation and output escaping mechanisms within the plugin's block options handling system. The vulnerability specifically targets the plugin's ability to process and render user-supplied data within WordPress editor blocks, creating an attack vector that can be exploited by users holding the contributor role or higher privileges within the WordPress environment.
The technical flaw manifests when the plugin fails to properly sanitize and escape block options before rendering them in the front-end output. This oversight allows malicious actors to inject malicious JavaScript code through the plugin's block configuration interface, which then gets stored in the WordPress database and executed whenever the affected page or post is rendered. The vulnerability is classified under CWE-79 as a cross-site scripting weakness, specifically a stored XSS variant where the malicious payload persists in the application's data storage. The attacker's ability to leverage this vulnerability is significantly enhanced by the fact that contributors and above can access the block editor interface, making the attack surface more accessible than typical XSS vulnerabilities that require more privileged access.
The operational impact of CVE-2023-0379 extends beyond simple script execution, as it can enable attackers to perform a wide range of malicious activities including but not limited to session hijacking, credential theft, redirection to malicious sites, and data exfiltration. When users with contributor privileges or higher interact with the plugin's block editor, they inadvertently become potential vectors for attackers to establish persistent access to the WordPress installation. The stored nature of the XSS vulnerability means that the malicious scripts will execute for all users who view the affected pages, potentially affecting thousands of visitors depending on the plugin's usage within the WordPress site. This vulnerability directly aligns with ATT&CK technique T1566.001 for initial access through malicious content and can facilitate further exploitation through techniques like credential access and privilege escalation.
Organizations affected by this vulnerability should immediately upgrade to version 1.4.3 or later of the Spotlight Social Feeds plugin to remediate the XSS vulnerability. The mitigation strategy should include comprehensive monitoring of user activities within the WordPress admin interface, particularly around block editor usage and plugin configuration changes. Security teams should implement proper input validation and output escaping mechanisms at the application level, ensuring that all user-supplied data is properly sanitized before being stored or rendered. Additionally, implementing content security policies and regular security audits of WordPress plugins can help prevent similar vulnerabilities from being exploited in the future, as the vulnerability demonstrates the critical importance of proper data sanitization in web applications. The affected WordPress installations should also consider implementing additional security measures such as role-based access controls and monitoring for unauthorized plugin modifications to further protect against potential exploitation of this and similar vulnerabilities.