CVE-2025-34032 Scanner

Moodle LMS Jmol Plugin is a widely used plugin in the Moodle Learning Management System (LMS), a platform popular among educational institutions for creating online learning websites. It allows educators to incorporate interactive 3D molecular visualizations using Jmol technology into their Moodle courses. The plugin is primarily used by schools, colleges, and universities that offer courses in chemistry and related fields to enhance the teaching and learning experience. By utilizing this plugin, educators can provide students with immersive and interactive learning tools which are crucial for understanding complex molecular structures. The plugin supports various media types and integrates smoothly into the Moodle environment, making it a valuable resource for institutions that focus on scientific subjects. Administrators and educators implement this plugin to create enriched content that facilitates a comprehensive educational experience for learners.

Cross-Site Scripting (XSS) is a vulnerability that allows attackers to inject malicious scripts into web pages viewed by other users. This particular XSS vulnerability affects the Moodle LMS Jmol Plugin, which can be exploited via the data parameter in the jsmol.php file. Because the plugin does not sufficiently sanitize user inputs, attackers can craft malicious URLs that include JavaScript code, which is then executed in the context of the victim's browser. This can lead to session hijacking, unauthorized actions in the web application, and unauthorized access to sensitive information. Cross-Site Scripting is a prevalent issue in web applications that handle user input without proper validation or escaping, leading to significant breaches in data security and privacy.

The technical details of this vulnerability include manipulating the data parameter within the jsmol.php script by supplying a crafted URL with embedded JavaScript code. The endpoint fails to sanitize these inputs before rendering them in the HTTP response, executing the script in the victim's browser. Vulnerable parameters include those that directly use user-supplied data without proper encoding, allowing the injected script to run as if it were legitimate content. Mitigation involves implementing input validation, context-aware output encoding on user inputs, and leveraging Content Security Policy (CSP) headers to prevent untrusted script executions. It is critical to address these points to secure web applications from such injection attacks effectively.

The exploitation of this vulnerability could have several severe consequences. Malicious actors can gain unauthorized control over user accounts by executing arbitrary scripts, potentially leading to data theft or identity impersonation. Users may unknowingly perform actions on behalf of attackers, including sending sensitive data to remote servers controlled by the attacker. The integrity of the web application can also be compromised, allowing attackers to alter content displayed to users, spreading misinformation or conducting scams. An exploited XSS vulnerability erodes trust in online platforms, as users become wary of the security and privacy of using these services.

REFERENCES

• https://www.dionach.com/blog/moodle-jmol-plugin-multiple-vulnerabilities/
• https://nvd.nist.gov/vuln/detail/CVE-2025-34032