CVE-2023-39345

Unauthorized Access to Private Fields in User Registration API

  const { auth } = ctx.state;
  const data = ctx.request.body;
  const userSchema = strapi.getModel("plugin::users-permissions.user");

  sanitize.contentAPI.input(data, userSchema, { auth });

  const body = ctx.request.body;

  const { attributes } = strapi.getModel("plugin::users-permissions.user");

  const sanitizedData = _.omitBy(body, (data, key) => {
    const attribute = attributes[key];

    if (_.isNil(attribute)) {
      return false;
    }

    //? If you want, you can throw an error for fields that we did not expect.

    // if (_.isNil(attribute))
    //   throw new ApplicationError(`Unexpected value ${key}`);

    // if private value is true, we do not want to send it to the database.
    return attribute.private;
  });

  return sanitizedData;

The application does not adequately verify the identity of a user, device, or process before granting access. Typical impact: unauthorized access to functions or data reserved for authenticated parties.

CVE-2023-39345 has a CVSS score of 7.6 (High). The vector is reachable from an adjacent network, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (4.13.1); upgrading removes the vulnerable code path.

Kodem intelligence

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1. What is CVE-2023-39345? CVE-2023-39345 is a high-severity improper authentication vulnerability in @strapi/plugin-users-permissions (npm), affecting versions >= 4.0.0, < 4.13.1. It is fixed in 4.13.1. The application does not adequately verify the identity of a user, device, or process before granting access.
2. How severe is CVE-2023-39345? CVE-2023-39345 has a CVSS score of 7.6 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which packages are affected by CVE-2023-39345?
   • @strapi/plugin-users-permissions (npm) (versions >= 4.0.0, < 4.13.1)
   • @strapi/strapi (npm) (versions >= 4.0.0, < 4.13.1)
4. Is there a fix for CVE-2023-39345? Yes. CVE-2023-39345 is fixed in 4.13.1. Upgrade to this version or later.
5. Is CVE-2023-39345 exploitable, and should I be worried? Whether CVE-2023-39345 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether CVE-2023-39345 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix CVE-2023-39345?
   • Upgrade @strapi/plugin-users-permissions to 4.13.1 or later
   • Upgrade @strapi/strapi to 4.13.1 or later

Other vulnerabilities in @strapi/plugin-users-permissions