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0 CVE-2023-53876 is a medium-severity vulnerability in Creativeitem's Academy LMS version 6.1 that allows authenticated users to upload malicious SVG files containing stored cross-site scripting (XSS) payloads. The flaw arises from insufficient validation of file types in the profile avatar upload feature, enabling attackers to bypass restrictions by modifying file extensions and embedding executable JavaScript code within SVG files. Exploitation requires user authentication and some user interaction, but no elevated privileges. Successful attacks could lead to script execution in the context of other users, potentially compromising session data and user accounts. No known exploits are currently reported in the wild. European organizations using Academy LMS 6.1 should prioritize patching or implementing mitigations to prevent abuse. Countries with significant e-learning adoption and Creativeitem customer bases, such as Germany, France, and the UK, are most likely to be affected. Mitigation includes strict file type validation, sanitizing SVG content, and restricting avatar upload capabilities. Join the discussion | CVE Database V5 | 12/15/2025, 20:28:17 UTC Added: 12/15/2025, 20:45:20 UTC |
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