Label Studio vulnerable to Cross-site Scripting if `<Choices>` or `<Labels>` are used in labeling config

### 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.

CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

Severity from

GitHub (reviewed advisory)

Weakness

CWE-79

Also known as

CVE-2024-26152, PYSEC-2024-249

• github.com/HumanSignal/label-studio/security/advisories/GHSA-6xv9-957j-qfhg
• nvd.nist.gov/vuln/detail/CVE-2024-26152
• github.com/HumanSignal/label-studio/pull/5232
• github.com/HumanSignal/label-studio/commit/5df9ae3828b98652e9fa290a19f4deedf51ef6c8
• github.com/HumanSignal/label-studio
• github.com/HumanSignal/label-studio/releases/tag/1.11.0
• github.com/pypa/advisory-database/tree/main/vulns/label-studio/PYSEC-2024-249.yaml