CVE-2025-65734 in Open eClass
Summary
by MITRE • 03/16/2026
An authenticated arbitrary file upload vulnerability in the Courses/Work Assignments module of gunet Open eClass v3.11, and fixed in v3.13, allows attackers to execute arbitrary code via uploading a crafted SVG file.
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Analysis
by VulDB Data Team • 03/21/2026
The vulnerability identified as CVE-2025-65734 represents a critical security flaw within the gunet Open eClass learning management system version 3.11 that was subsequently addressed in version 3.13. This issue resides within the Courses/Work Assignments module, which is a core component responsible for managing course content and student submissions. The vulnerability stems from inadequate input validation and sanitization mechanisms that fail to properly handle file uploads, creating an avenue for malicious actors to bypass security controls and execute unauthorized operations. The flaw specifically manifests when users with valid authentication credentials attempt to upload files through the assignment submission interface, making it particularly dangerous as it requires only legitimate user access rather than privileged administrative privileges.
The technical nature of this vulnerability aligns with CWE-434, which describes the improper restriction of uploads of executable files, and represents a classic case of insecure file handling in web applications. Attackers can exploit this weakness by crafting specially designed SVG files that contain malicious code or embedded scripts, which the system accepts due to insufficient validation of file content and type. The vulnerability allows for arbitrary file upload because the application fails to properly validate the file's actual content against its declared MIME type or file extension, enabling attackers to upload files that appear to be legitimate SVG images while containing malicious payloads. This misconfiguration creates a pathway for code execution, as the system processes the uploaded files without adequate security checks that would normally prevent potentially harmful content from being stored or executed within the application environment.
The operational impact of this vulnerability extends beyond simple unauthorized file placement, as it provides attackers with the capability to execute arbitrary code on the affected system. This code execution ability can result in complete system compromise, allowing attackers to gain unauthorized access to sensitive educational data, modify course content, manipulate student records, or establish persistent backdoors for continued access. The vulnerability's exploitation requires only authenticated access, meaning that any user with valid credentials to the Open eClass system could potentially leverage this flaw, making it particularly concerning for educational institutions that rely on this platform for managing sensitive academic information. The potential for data breaches, unauthorized content modification, and system infiltration creates significant operational risks that could affect both administrative functions and student privacy.
Security mitigations for this vulnerability should focus on implementing robust file validation mechanisms that check both file headers and content against expected formats, rather than relying solely on file extensions or MIME types. Organizations should ensure that all file uploads undergo thorough content inspection using multiple validation layers including file signature verification, content type analysis, and sandboxed execution environments for suspicious files. The fix implemented in Open eClass v3.13 likely includes enhanced input validation that properly sanitizes uploaded files, enforces strict file type restrictions, and implements proper content verification procedures that prevent malicious files from being processed. Additionally, implementing principle of least privilege access controls, regular security audits of file upload functionalities, and monitoring for unusual file upload patterns can help detect and prevent exploitation attempts. Organizations should also consider implementing web application firewalls and content security policies that further restrict file upload capabilities and provide additional layers of protection against similar vulnerabilities in other components of the system.