CVE-2025-25296

Summary

CVE-2025-25296 is a vulnerability affecting Label Studio, an open-source data labeling tool, prior to version 1.16.0. The vulnerability allows for Cross-Site Scripting (XSS) attacks through the `/projects/upload-example` endpoint. By crafting a specifically formatted XML label config with inline task data containing malicious HTML/JavaScript, attackers can inject and execute arbitrary scripts in victims' browsers. The application's Content Security Policy (CSP) only functions in report-only mode, rendering it ineffective against script execution. The vulnerability arises due to the endpoint rendering user-provided HTML content without proper sanitization on a GET request. This exposure can lead to data theft, session hijacking, and other malicious actions. Version 1.16.0 includes a patch to address this issue.

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