Executive Summary

This vulnerability is a stored cross-site scripting (XSS) issue in DataEase versions up to 2.10.13. It occurs because the application improperly validates file uploads and bypasses authentication checks for certain file extensions like .js. Attackers can upload malicious HTML files containing JavaScript by exploiting the upload/{fileId} route, which trusts files ending with .js or similar extensions without proper permission validation. This allows execution of malicious scripts when the uploaded files are accessed.

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Impact Analysis

This vulnerability can allow attackers to execute malicious JavaScript in the context of the affected application, potentially leading to unauthorized actions, data theft, session hijacking, or other malicious activities. Since the vulnerability involves stored XSS, the malicious script can persist and affect multiple users who access the compromised files.

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Mitigation Strategies

Upgrade DataEase to version 2.10.14 or later, as this version contains the fix for the vulnerability. No known workarounds exist, so applying the update is the immediate mitigation step.

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