CVE-2026-7544 in Mux Video Uploader Plugin
Summary
by MITRE • 07/11/2026
The Mux Video Uploader plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 1.1.4 via the muxvideo_enqueue_settings_script. This makes it possible for authenticated attackers, with subscriber-level access and above, to extract sensitive data including Mux API credentials.
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Analysis
by VulDB Data Team • 07/11/2026
The Mux Video Uploader plugin for WordPress presents a critical security vulnerability categorized as sensitive information exposure affecting all versions through 1.1.4. This flaw resides within the muxvideo_enqueue_settings_script functionality which improperly handles credential exposure during script enqueuing processes. The vulnerability specifically targets authenticated attackers who possess subscriber-level access or higher privileges within the WordPress environment, making it particularly concerning given the widespread use of WordPress platforms and the relatively low privilege requirement needed to exploit this weakness.
The technical implementation of this vulnerability stems from improper handling of API credentials within the plugin's JavaScript asset loading mechanism. When the muxvideo_enqueue_settings_script function executes, it inadvertently exposes Mux API credentials through insecure data transmission or inadequate access controls during script initialization. This occurs because the plugin fails to properly sanitize or restrict access to sensitive configuration parameters that contain authentication tokens and credential information necessary for Mux platform integration. The flaw aligns with CWE-200 which specifically addresses the improper exposure of sensitive information and represents a direct violation of secure coding practices for credential management.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with access to critical infrastructure credentials that can be leveraged for further compromise. With Mux API credentials in hand, an authenticated attacker could potentially manipulate video uploads, access stored media content, modify upload settings, or even use the compromised credentials to access other systems where these same credentials might be reused. The vulnerability creates a persistent threat vector since the exposed credentials remain valid and functional until manually rotated by administrators, providing attackers with extended periods of unauthorized access.
This vulnerability directly maps to several ATT&CK techniques including T1566 for credential harvesting and T1071 for application layer protocol usage. The attack surface is particularly concerning given that WordPress subscriber accounts are often easily obtainable through social engineering or brute force attacks, making this vulnerability exploitable by threat actors with minimal initial access requirements. Organizations utilizing the Mux Video Uploader plugin face significant risk of data breaches and unauthorized media manipulation, particularly in environments where video content management is critical for business operations or customer engagement.
Mitigation strategies should prioritize immediate credential rotation for all affected systems, followed by plugin version updates to address the identified flaw. Administrators must implement strict access controls ensuring that only authorized personnel possess subscriber-level privileges or higher within WordPress installations. Network monitoring and log analysis should be enhanced to detect unusual API access patterns or credential exposure attempts. Additionally, implementing principle of least privilege configurations for all WordPress plugins and conducting regular security audits can prevent similar vulnerabilities from emerging in other components of the platform architecture. The vulnerability underscores the importance of secure credential handling practices and proper input validation within web applications, particularly those involving third-party service integrations that require authentication tokens and API keys for operation.