CVE Alert: CVE-2025-25296
Vulnerability Summary: CVE-2025-25296
Label Studio is an open source data labeling tool. Prior to version 1.16.0, Label Studio’s `/projects/upload-example` endpoint allows injection of arbitrary HTML through a `GET` request with an appropriately crafted `label_config` query parameter. By crafting a specially formatted XML label config with inline task data containing malicious HTML/JavaScript, an attacker can achieve Cross-Site Scripting (XSS). While the application has a Content Security Policy (CSP), it is only set in report-only mode, making it ineffective at preventing script execution. The vulnerability exists because the upload-example endpoint renders user-provided HTML content without proper sanitization on a GET request. This allows attackers to inject and execute arbitrary JavaScript in victims’ browsers by getting them to visit a maliciously crafted URL. This is considered vulnerable because it enables attackers to execute JavaScript in victims’ contexts, potentially allowing theft of sensitive data, session hijacking, or other malicious actions. Version 1.16.0 contains a patch for the issue.
Affected Endpoints:
- GET request
Published Date:
2/14/2025, 8:15:36 PM
⚠️ CVSS Score:
Exploit Status:
Not ExploitedReferences:
- https://github.com/HumanSignal/label-studio/commit/8cf6958e1e27ef6a03ed287e674470975d340885
- https://github.com/HumanSignal/label-studio/security/advisories/GHSA-wpq5-3366-mqw4
Recommended Action:
No proposed action available. Please refer to vendor documentation for updates.
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