The Nicepage website builder, specifically version 4.5.4, was found to contain a critical security vulnerability that could allow attackers to compromise affected systems. This flaw highlights the ongoing risks associated with third-party web design tools and the importance of timely software updates. Vulnerability Overview The exploit in Nicepage 4.5.4 is categorized as a Stored Cross-Site Scripting (XSS)
Understanding how this exploit works, its structural architecture, and how to protect a web application is critical for system administrators and web developers alike. Anatomy of the Vulnerability
Automated security posture scans frequently highlight how legacy Nicepage plugin scripts inadvertently expose underlying directory structures or append predictable parameters in administrative files. This facilitates administrative path discovery (e.g., exposing hidden /wp-admin routes) and enables brute-force scanning scripts to trace configuration parameters. Nicepage 4.12: File Upload In Contact Forms nicepage 4.5.4 exploit
Historically, older versions of website builders bundle embedded components like legacy jQuery libraries (e.g., jQuery 1.9.1 or old bootstrap scripts) to handle legacy visual effects and animations. These deprecated dependencies have documented, publicly reachable Common Vulnerabilities and Exposures (CVEs). This allows an external threat actor to achieve DOM-based manipulation without authenticating directly against the host application CMS. 3. Path Exposure and Information Leakage
If the server-side code fails to sanitize the malicious request properly, the payload executes. This might result in the attacker gaining remote code execution (RCE) privileges, allowing them to install backdoors, steal sensitive databases, or redirect website traffic. The Importance of Keeping Nicepage Updated The Nicepage website builder, specifically version 4
Newer versions (around 4.12) specifically fixed issues where HTML code could be processed incorrectly within submitted contact forms. In older versions like 4.5.4, this could potentially lead to script execution if the form data was displayed on the administrative backend without proper sanitization. 2. General WordPress 4.5.x Vulnerabilities
This request would retrieve the wp-config.php file, exposing database credentials. cross-site request forgery (CSRF)
: This specific version was part of a series (4.5.x) vulnerable to cross-site scripting (XSS) , cross-site request forgery (CSRF) , and potential remote code execution (RCE) .
: Improperly sanitized input in contact forms or custom PHP scripts could allow for HTML injection or XSS.
