Master Slider is a widely used WordPress plugin that enables users to create responsive sliders for showcasing images, videos, and other content. However, a critical Stored Cross-Site Scripting (XSS) vulnerability, CVE-2024-12173, has been discovered in the plugin. This flaw allows attackers with editor-level access to inject malicious JavaScript into the “Slider custom styles” field within the plugin’s main settings. The injected script is then executed on the frontend when the slider is rendered, which can lead to account takeover and the creation of a backdoor admin account. With over 100,000 active installations, this vulnerability presents a significant security risk for WordPress sites using Master Slider.
CVE-2024-12173 – Master Slider – Stored XSS to JS Backdoor Creation – POC
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