CVE-2025-7726 in The7 Plugin
Summary
by MITRE • 08/09/2025
The The7 theme for WordPress is vulnerable to Stored Cross-Site Scripting via its lightbox rendering code in all versions up to, and including, 12.6.0 due to insufficient input sanitization and output escaping. The theme’s JavaScript reads user-supplied 'title' and 'data-dt-img-description' attributes directly via jQuery.attr(), concatenates them into an HTML string, and inserts that string into the DOM using methods such as jQuery.html() without escaping or filtering. 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 • 08/12/2025
The vulnerability identified as CVE-2025-7726 affects the The7 theme for WordPress, specifically targeting versions up to and including 12.6.0. This represents a critical security flaw that enables stored cross-site scripting attacks through the theme's lightbox rendering functionality. The issue stems from inadequate input validation and output escaping mechanisms within the theme's JavaScript implementation, creating a persistent vector for malicious code injection that can affect all users who view compromised content.
The technical flaw manifests in the theme's JavaScript code where user-supplied attributes including 'title' and 'data-dt-img-description' are directly accessed through jQuery.attr() method without proper sanitization. These attributes are then concatenated into HTML strings and subsequently inserted into the Document Object Model using jQuery.html() methods. This approach bypasses standard security measures that would normally prevent malicious script execution by failing to escape or filter the user-provided content before DOM insertion. The vulnerability operates at the intersection of CWE-79 Improper Neutralization of Input During Web Page Generation and CWE-80 Client Side Injection, as it allows attackers to inject malicious scripts that execute in the context of other users' browsers.
The operational impact of this vulnerability is significant as it requires only Contributor-level access or higher to exploit, making it particularly dangerous in environments where multiple users have varying permission levels. Authenticated attackers can inject arbitrary web scripts that will execute whenever any user accesses pages containing the malicious content, potentially leading to session hijacking, credential theft, or further compromise of the WordPress installation. The stored nature of the vulnerability means that once injected, malicious code persists until manually removed, creating a continuous threat vector that can affect all users who encounter the compromised content.
Security mitigations for this vulnerability should include immediate patching of the The7 theme to version 12.6.1 or later, which contains the necessary input sanitization and output escaping fixes. Administrators should also implement additional defensive measures such as monitoring user activity for suspicious attribute modifications, implementing content security policies to limit script execution, and conducting regular security audits of theme files. From an ATT&CK perspective, this vulnerability maps to T1546.001 Account Manipulation and T1566.001 Phishing, as attackers can use this vector to manipulate user accounts and deliver malicious payloads. Organizations should also consider implementing web application firewalls and input validation rules to prevent similar issues in other themes or plugins that may exhibit similar patterns of insecure data handling.