Description
### Summary On all Label Studio versions prior to 1.11.0, data imported via file upload feature is not properly sanitized prior to being rendered within a [`Choices`](https://labelstud.io/tags/choices) or [`Labels`](https://labelstud.io/tags/labels) tag, resulting in an XSS vulnerability.
### Details Need permission to use the "data import" function. This was reproduced on Label Studio 1.10.1.
### PoC
1. Create a project. 
2. Upload a file containing the payload using the "Upload Files" function.  
The following are the contents of the files used in the PoC ``` { "data": { "prompt": "labelstudio universe image", "images": [ { "value": "id123#0", "style": "margin: 5px", "html": "<img width='400' src='https://labelstud.io/_astro/images-tab.64279c16_ZaBSvC.avif' onload=alert(document.cookie)>" } ] } } ```
3. Select the text-to-image generation labeling template of Ranking and scoring  
4. Select a task 
5. Check that the script is running 
### Impact Malicious scripts can be injected into the code, and when linked with vulnerabilities such as CSRF, it can cause even greater damage. In particular, It can become a source of further attacks, especially when linked to social engineering.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| HumanSignal | label-studio | < 1.11.0 |
| humansignal | label_studio | < 1.11.0 |
References
- https://github.com/HumanSignal/label-studio/commit/5df9ae3828b98652e9fa290a19f4deedf51ef6c8Patch
- https://github.com/HumanSignal/label-studio/pull/5232Patch
- https://github.com/HumanSignal/label-studio/releases/tag/1.11.0Release Notes
- https://github.com/HumanSignal/label-studio/security/advisories/GHSA-6xv9-957j-qfhgExploit, Vendor Advisory
- https://github.com/HumanSignal/label-studio/commit/5df9ae3828b98652e9fa290a19f4deedf51ef6c8Patch
- https://github.com/HumanSignal/label-studio/pull/5232Patch
- https://github.com/HumanSignal/label-studio/releases/tag/1.11.0Release Notes
- https://github.com/HumanSignal/label-studio/security/advisories/GHSA-6xv9-957j-qfhgExploit, Vendor Advisory
Timeline
- Published
- Feb 22, 2024
- Last modified
- Jun 17, 2026
- NVD status
- Analyzed