PYSEC-2026-1504 Label Studio allows Cross-Site Scripting (XSS) via GET request to `/projects/upload-example` endpoint

Description Label Studio's /projects/upload-example endpoint allows injection of arbitrary HTML through a GET request with an appropriately crafted labelconfig query parameter. By crafting a specially formatted XML label config with inline task data containing malicious HTML/JavaScript, an attack...

Cross-site Scripting (XSS)

Overview label-studio is a Label Studio annotation tool Affected versions of this package are vulnerable to Cross-site Scripting XSS via the labelconfig parameter in labelstudio/projects/views.py. An attacker can execute arbitrary scripts in the context of the user's browser by sending malicious...

Cross-site Scripting (XSS)

Overview label-studio is a Label Studio annotation tool Affected versions of this package are vulnerable to Cross-site Scripting XSS through the /projects/upload-example endpoint due to improper sanitization of the input passed to the labelconfig query parameter. PoC Create a malicious label conf...

PT-2025-7075

Name of the Vulnerable Software and Affected Versions: Label Studio versions prior to 1.16.0 Description: The issue allows injection of arbitrary HTML through a GET request with an appropriately crafted label config query parameter at the /projects/upload-example endpoint. This enables Cross-Site...