CVE-2025-55006 is a medium-severity vulnerability affecting Frappe Learning Management System (LMS) versions 2.33.0 and below. The vulnerability arises from improper input validation (CWE-20) in the image upload functionality, specifically concerning SVG files. SVG (Scalable Vector Graphics) files can contain embedded JavaScript or other active content. In the affected versions, the LMS does not adequately sanitize uploaded SVG files, allowing malicious users to upload SVGs containing embedded scripts. When other users view these SVG files within the LMS, the embedded scripts can execute in their browser context, leading to potential cross-site scripting (XSS) attacks. This could allow attackers to perform actions on behalf of other users, steal session tokens, or manipulate LMS content. The vulnerability requires authenticated users to upload malicious SVG files and some user interaction to trigger the script execution. The CVSS 3.1 score is 4.3 (medium), reflecting network attack vector, low attack complexity, high privileges required, and user interaction needed. No known exploits are currently reported in the wild, and a fix is planned for version 2.34.0. The vulnerability highlights the risks of insufficient sanitization of SVG uploads in web applications, especially in collaborative platforms like LMS where multiple users interact with shared content.

For European organizations using Frappe LMS, this vulnerability could lead to unauthorized script execution within the LMS environment. Potential impacts include theft of user credentials or session tokens, unauthorized actions performed by attackers impersonating legitimate users, and manipulation or defacement of educational content. This can undermine the integrity and confidentiality of educational data and disrupt learning activities. Organizations in education, training, and corporate learning sectors are particularly at risk. Since the vulnerability requires authenticated access to upload SVGs, insider threats or compromised accounts could be leveraged. The availability impact is limited but possible if attackers use the vulnerability to inject disruptive scripts. Given the collaborative nature of LMS platforms, the risk of lateral movement or further exploitation exists if attackers gain footholds. European institutions with strict data protection regulations (e.g., GDPR) must consider the compliance implications of such data breaches or unauthorized access incidents.

1. Upgrade Frappe LMS to version 2.34.0 or later as soon as the patch is released to ensure proper sanitization of SVG uploads. 2. In the interim, restrict or disable SVG file uploads within the LMS to prevent exploitation. 3. Implement additional server-side validation and sanitization of SVG files using specialized libraries that remove embedded scripts and active content before accepting uploads. 4. Enforce strict access controls and monitor user activities related to file uploads to detect anomalous behavior. 5. Educate LMS users about the risks of uploading untrusted SVG content and encourage reporting of suspicious files. 6. Employ Content Security Policy (CSP) headers to limit the impact of any injected scripts by restricting script execution sources. 7. Regularly audit LMS logs for unusual upload patterns or script execution errors. 8. Consider network segmentation and limiting LMS access to trusted users to reduce exposure.