bagisto - Cross Site Scripting (XSS) in TinyMCE Image Upload (SVG)

The primary impact of CVE-2025-62418 is the potential for Cross-Site Scripting (XSS). An attacker can leverage this vulnerability to inject malicious JavaScript code into the Bagisto platform. This code can then be executed in the browsers of administrators and other users with sufficient privileges. Successful exploitation could allow an attacker to steal session cookies, redirect users to phishing sites, deface the website, or even gain unauthorized access to sensitive data stored within the Bagisto system. The blast radius extends to any user who views the malicious image, making it a significant security concern, particularly for platforms with a large user base and sensitive customer data. While the vulnerability requires administrative privileges to initially upload the malicious SVG, the subsequent impact can affect a wide range of users.

1. 予約済み2025-10-13
2. 公開日2025-10-16
3. 更新日2025-10-17
4. EPSS 更新日2026-03-23

The primary mitigation for CVE-2025-62418 is to immediately upgrade Bagisto to version 2.3.8 or later. If upgrading is not immediately feasible, consider implementing temporary workarounds. Strictly validate all file uploads, particularly SVG files, to ensure they do not contain embedded JavaScript. Implement a Web Application Firewall (WAF) with rules to block the upload of SVG files containing JavaScript or other potentially malicious code. Consider using a content security policy (CSP) to restrict the execution of inline scripts and control the sources from which scripts can be loaded. Monitor Bagisto logs for suspicious file upload activity and unusual JavaScript execution patterns. After upgrading to 2.3.8, verify the fix by attempting to upload a test SVG file containing a simple JavaScript alert and confirming that it is blocked or sanitized.