{"id":82502,"date":"2025-10-10T21:26:24","date_gmt":"2025-10-10T21:26:24","guid":{"rendered":""},"modified":"2025-10-21T04:13:07","modified_gmt":"2025-10-21T10:13:07","slug":"cve-2025-56515-file-upload-vulnerability-in-fiora-chat-application-1-0-0","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-56515-file-upload-vulnerability-in-fiora-chat-application-1-0-0\/","title":{"rendered":"CVE-2025-56515: File Upload Vulnerability in Fiora Chat Application 1.0.0<\/strong>"},"content":{"rendered":"
Overview<\/strong><\/p>\n
This blog post discusses the details of a serious vulnerability, CVE-2025-56515, identified in the Fiora Chat Application version 1.0.0. The flaw lies within the user avatar upload functionality, which allows for the upload and storage of malicious SVG files. This vulnerability is particularly critical<\/a> as it can lead to the execution of arbitrary JavaScript, enabling attackers to steal user sessions and cookies, and perform unauthorized actions on behalf of users viewing affected profiles. This poses a significant threat to both users and organizations, potentially leading to system<\/a> compromise or data leakage.<\/p>\n
Vulnerability Summary<\/strong><\/p>\n
CVE ID: CVE-2025-56515
\nSeverity: High (8.8 CVSS Severity Score)
\nAttack Vector: Remote
\nPrivileges Required: None
\nUser Interaction: Required
\nImpact: Potential system compromise<\/a> or data leakage<\/p>\n
Affected Products<\/strong><\/p>\n
Product | Affected Versions<\/p>\n
Fiora Chat Application | 1.0.0<\/p>\n
How the Exploit Works<\/strong><\/p>\n
The vulnerability arises from the application’s failure to validate SVG file<\/a> content during the user avatar upload process. Attackers can exploit this flaw by embedding foreignObject elements<\/a> containing iframe tags and JavaScript event handlers (onmouseover) into SVG files. These malicious files are then uploaded<\/a> and stored within the application. When these SVG files are rendered, they execute arbitrary<\/a> JavaScript which can lead to unauthorized actions being performed, session theft, and cookie theft.<\/p>\n
Conceptual Example Code<\/strong><\/p>\n
Here is a conceptual example of how the vulnerability might be exploited. This is a sample of a crafted SVG file containing malicious JavaScript:<\/p>\n