CVE-2024-8046 in Logo Showcase Ultimate PLugin
Summary
by MITRE • 08/27/2024
The Logo Showcase Ultimate – Logo Carousel, Logo Slider & Logo Grid plugin for WordPress is vulnerable to Stored Cross-Site Scripting via SVG File uploads in all versions up to, and including, 1.4.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses the SVG file.
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Analysis
by VulDB Data Team • 03/12/2025
The vulnerability identified as CVE-2024-8046 affects the Logo Showcase Ultimate WordPress plugin, specifically targeting versions up to and including 1.4.1. This plugin facilitates the display of logos through various carousel, slider, and grid interfaces, making it a common component in WordPress websites that showcase brand assets. The security flaw manifests in the plugin's handling of SVG file uploads, which are widely used for scalable vector graphics in web design and often trusted for their visual capabilities without the same security scrutiny applied to other file types.
The technical root cause of this vulnerability stems from inadequate input sanitization and output escaping mechanisms within the plugin's file upload processing. When administrators or users with Author-level privileges upload SVG files through the plugin interface, the system fails to properly validate or sanitize the content of these files before storing them within the WordPress environment. This insufficient sanitization creates a persistent XSS vector where malicious SVG files can contain embedded script tags or other malicious code that executes when the file is rendered or accessed by other users. The vulnerability is classified under CWE-79 as a Cross-Site Scripting flaw, specifically in the context of stored data where the malicious content is permanently stored and executed on subsequent page requests.
The operational impact of this vulnerability is significant for WordPress sites utilizing the affected plugin, as it allows authenticated attackers with minimal privileges to compromise the integrity of the website and potentially escalate their access. An attacker with Author-level permissions can upload a malicious SVG file that, when accessed by other users, will execute arbitrary JavaScript code in their browser context. This could enable various malicious activities including session hijacking, credential theft, redirection to malicious sites, or even the execution of more sophisticated attacks such as privilege escalation within the WordPress environment. The stored nature of the vulnerability means that the malicious code persists even after the initial upload, making it particularly dangerous as it can affect multiple users over time without requiring repeated exploitation attempts.
The security implications extend beyond simple script execution, as this vulnerability can be leveraged as a stepping stone for more comprehensive attacks against WordPress installations. Attackers can use the stored XSS to inject malicious scripts that target other components of the WordPress ecosystem, potentially compromising user accounts or even the entire website. The vulnerability's presence in a widely-used plugin increases the attack surface significantly, as many WordPress sites may be unknowingly vulnerable to this type of attack. Organizations should consider implementing proper input validation and output escaping mechanisms for all file uploads, particularly for SVG files which are often treated with less security scrutiny than other file types. The ATT&CK framework categorizes this as a form of code injection and privilege escalation through web application vulnerabilities, emphasizing the need for proper input sanitization and the principle of least privilege in WordPress administration.
Mitigation strategies should include immediate patching of the affected plugin to the latest version where the vulnerability has been addressed, proper input validation and sanitization of all uploaded files, and the implementation of Content Security Policies to prevent execution of unauthorized scripts. Administrators should also consider restricting upload privileges to only trusted users and implementing additional monitoring for suspicious file uploads. Regular security audits of WordPress plugins and themes should be conducted to identify similar vulnerabilities, and organizations should maintain updated security policies that address file upload security controls. The vulnerability serves as a reminder of the critical importance of proper input validation and output escaping in web applications, particularly when dealing with user-uploaded content that may be executed in browser contexts.