CVE-2025-7732 in Lazy Load for Videos Plugin
Summary
by MITRE • 08/27/2025
The Lazy Load for Videos plugin for WordPress is vulnerable to Stored Cross-Site Scripting via its lazy‑loading handlers in all versions up to, and including, 2.18.7 due to insufficient input sanitization and output escaping. The plugin’s JavaScript registration handlers read the client‑supplied 'data-video-title' and 'href' attributes, decode HTML entities by default, and pass them directly into DOM sinks without any escaping or validation. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
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Analysis
by VulDB Data Team • 08/27/2025
The Lazy Load for Videos plugin for WordPress presents a critical stored cross-site scripting vulnerability that affects all versions up to and including 2.18.7. This vulnerability stems from inadequate input sanitization and output escaping mechanisms within the plugin's JavaScript registration handlers. The flaw specifically targets the handling of client-supplied data attributes including 'data-video-title' and 'href' which are processed without proper validation or sanitization before being inserted into DOM elements. The vulnerability is particularly concerning because it allows authenticated attackers who possess Contributor-level access or higher to execute malicious scripts within the context of affected WordPress installations.
The technical implementation of this vulnerability involves the plugin's JavaScript handlers that automatically decode HTML entities from user-supplied input without subsequent sanitization or escaping. When the plugin processes video elements, it reads these attributes directly from the DOM and passes them into DOM sinks without any protective measures against malicious input. This pattern creates a classic stored XSS attack vector where malicious scripts can be injected into video title attributes or href values and subsequently executed whenever users view pages containing these elements. The vulnerability operates under the principle that user-provided content is trusted without proper sanitization, allowing attackers to embed malicious JavaScript code that executes in the context of other users' browsers.
The operational impact of this vulnerability extends beyond simple script execution as it provides attackers with persistent access to affected WordPress installations. Since the attack requires only Contributor-level privileges, which many WordPress sites grant to trusted users or editors, the attack surface is significantly broadened. Attackers can inject malicious scripts that persist in the database and execute whenever legitimate users access pages containing the compromised video elements. This creates a persistent threat vector that can be used for session hijacking, data exfiltration, or redirection to malicious sites. The stored nature of the vulnerability means that once injected, the malicious code remains active until manually removed from the database, providing attackers with extended periods of access.
From a security standards perspective, this vulnerability aligns with CWE-79 (Cross-site Scripting) and follows the ATT&CK technique T1566.001 (Phishing via Service) where attackers can leverage the plugin to deliver malicious payloads to unsuspecting users. The vulnerability also demonstrates characteristics of ATT&CK technique T1059.007 (Command and Scripting Interpreter: JavaScript) as the malicious code executes within JavaScript contexts. Organizations should implement immediate mitigations including updating to patched versions of the plugin, implementing input validation at multiple layers, and conducting thorough audits of user permissions to reduce the attack surface. Additionally, implementing Content Security Policy headers and regular security scanning can provide additional defense-in-depth measures against similar vulnerabilities in the future.
The vulnerability highlights the critical importance of proper input validation and output escaping in web applications, particularly those handling user-generated content. The plugin's failure to sanitize user-supplied data before insertion into DOM elements represents a fundamental security flaw that could have been prevented through proper security coding practices. Organizations should prioritize regular security assessments of third-party plugins and maintain updated security policies that address the specific threat models associated with content management systems and their various user roles. The incident underscores the need for comprehensive security training for developers and administrators to prevent similar vulnerabilities from emerging in future software implementations.