PYSEC-2026-1905

Vulnerability from pysec - Published: 2026-07-07 11:45 - Updated: 2026-07-07 17:25
VLAI
Details

Summary

In the /license/ endpoint, the detailed view key is not properly validated and sanitized, which can result in a potential cross-site scripting (XSS) vulnerability when attempting to access a detailed license view that does not exist.

Details

In the /license/ endpoint, the license_details_view function is vulnerable to a potential cross-site scripting (XSS) attack due to inadequate validation and sanitization of the key parameter. This vulnerability arises when attempting to access a key with malicious javascript.

def license_details_view(request, key):
    """
    Display all available information about a given license `key` followed by
    the full license text.
    """
    licenses = get_licenses()
    try:
        data = saneyaml.dump(licenses[key].to_dict())
        text = licenses[key].text
    except KeyError:
        return HttpResponseNotFound(f"License {key} not found.") # Leads to cross-site scripting when key is malicious javascript
    return HttpResponse(f"<pre>{data}</pre><hr><pre>{text}</pre>")

PoC

  1. Access following endpoint on scancode.io instance: http://localhost/license/%3Cscript%3Ealert(document.cookie);%3C/script%3E/

Impact

Attackers can exploit the vulnerability to inject malicious scripts into the response generated by the license_details_view function. When unsuspecting users visit the page, their browsers will execute the injected scripts, leading to unauthorized actions, session hijacking, or stealing sensitive information.

Severity
6.1 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Impacted products
Name purl
scancodeio pkg:pypi/scancodeio
Aliases
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "scancodeio",
        "purl": "pkg:pypi/scancodeio"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "32.5.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "32.0.1",
        "32.1.0",
        "32.2.0",
        "32.4.0",
        "32.5.0",
        "32.5.1"
      ]
    }
  ],
  "aliases": [
    "CVE-2023-40024",
    "GHSA-6xcx-gx7r-rccj"
  ],
  "details": "### Summary\nIn the `/license/` endpoint, the detailed view key is not properly validated and sanitized, which can result in a potential cross-site scripting (XSS) vulnerability when attempting to access a detailed license view that does not exist.\n\n### Details\nIn the `/license/` endpoint, the `license_details_view` function is vulnerable to a potential cross-site scripting (XSS) attack due to inadequate validation and sanitization of the `key` parameter. This vulnerability arises when attempting to access a key with malicious javascript.\n\n```python\ndef license_details_view(request, key):\n    \"\"\"\n    Display all available information about a given license `key` followed by\n    the full license text.\n    \"\"\"\n    licenses = get_licenses()\n    try:\n        data = saneyaml.dump(licenses[key].to_dict())\n        text = licenses[key].text\n    except KeyError:\n        return HttpResponseNotFound(f\"License {key} not found.\") # Leads to cross-site scripting when key is malicious javascript\n    return HttpResponse(f\"\u003cpre\u003e{data}\u003c/pre\u003e\u003chr\u003e\u003cpre\u003e{text}\u003c/pre\u003e\")\n```\n\n\n### PoC\n1. Access following endpoint on scancode.io instance: http://localhost/license/%3Cscript%3Ealert(document.cookie);%3C/script%3E/\n\n### Impact\nAttackers can exploit the vulnerability to inject malicious scripts into the response generated by the `license_details_view` function. When unsuspecting users visit the page, their browsers will execute the injected scripts, leading to unauthorized actions, session hijacking, or stealing sensitive information.\n",
  "id": "PYSEC-2026-1905",
  "modified": "2026-07-07T17:25:21.767070Z",
  "published": "2026-07-07T11:45:22.677621Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/nexB/scancode.io/security/advisories/GHSA-6xcx-gx7r-rccj"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-40024"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/nexB/scancode.io"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nexB/scancode.io/blob/dd7769fbc97c84545579cebf1dc4838214098a11/CHANGELOG.rst#v3252-2023-08-14"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nexB/scancode.io/releases/tag/v32.5.2"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/scancodeio"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-6xcx-gx7r-rccj"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Scancode.io Reflected Cross-Site Scripting (XSS) in license endpoint"
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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