GSD-2020-7245

Vulnerability from gsd - Updated: 2023-12-13 01:21
Details
Incorrect username validation in the registration process of CTFd v2.0.0 - v2.2.2 allows an attacker to take over an arbitrary account if the username is known and emails are enabled on the CTFd instance. To exploit the vulnerability, one must register with a username identical to the victim's username, but with white space inserted before and/or after the username. This will register the account with the same username as the victim. After initiating a password reset for the new account, CTFd will reset the victim's account password due to the username collision.
Aliases
Aliases
CVE-2020-7245
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{
  "GSD": {
    "alias": "CVE-2020-7245",
    "description": "Incorrect username validation in the registration process of CTFd v2.0.0 - v2.2.2 allows an attacker to take over an arbitrary account if the username is known and emails are enabled on the CTFd instance. To exploit the vulnerability, one must register with a username identical to the victim\u0027s username, but with white space inserted before and/or after the username. This will register the account with the same username as the victim. After initiating a password reset for the new account, CTFd will reset the victim\u0027s account password due to the username collision.",
    "id": "GSD-2020-7245"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2020-7245"
      ],
      "details": "Incorrect username validation in the registration process of CTFd v2.0.0 - v2.2.2 allows an attacker to take over an arbitrary account if the username is known and emails are enabled on the CTFd instance. To exploit the vulnerability, one must register with a username identical to the victim\u0027s username, but with white space inserted before and/or after the username. This will register the account with the same username as the victim. After initiating a password reset for the new account, CTFd will reset the victim\u0027s account password due to the username collision.",
      "id": "GSD-2020-7245",
      "modified": "2023-12-13T01:21:51.753205Z",
      "schema_version": "1.4.0"
    }
  },
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        "ID": "CVE-2020-7245",
        "STATE": "PUBLIC"
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      "affects": {
        "vendor": {
          "vendor_data": [
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                    "product_name": "n/a",
                    "version": {
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      "references": {
        "reference_data": [
          {
            "name": "https://github.com/CTFd/CTFd/pull/1218",
            "refsource": "MISC",
            "url": "https://github.com/CTFd/CTFd/pull/1218"
          },
          {
            "name": "https://github.com/CTFd/CTFd/releases/tag/2.2.3",
            "refsource": "MISC",
            "url": "https://github.com/CTFd/CTFd/releases/tag/2.2.3"
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        "nodes": [
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            "children": [],
            "cpe_match": [
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                "cpe23Uri": "cpe:2.3:a:ctfd:ctfd:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndIncluding": "2.2.2",
                "versionStartIncluding": "2.0.0",
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          "ID": "CVE-2020-7245"
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        "description": {
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              "value": "Incorrect username validation in the registration process of CTFd v2.0.0 - v2.2.2 allows an attacker to take over an arbitrary account if the username is known and emails are enabled on the CTFd instance. To exploit the vulnerability, one must register with a username identical to the victim\u0027s username, but with white space inserted before and/or after the username. This will register the account with the same username as the victim. After initiating a password reset for the new account, CTFd will reset the victim\u0027s account password due to the username collision."
            }
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          "reference_data": [
            {
              "name": "https://github.com/CTFd/CTFd/releases/tag/2.2.3",
              "refsource": "MISC",
              "tags": [
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              "url": "https://github.com/CTFd/CTFd/releases/tag/2.2.3"
            },
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              "tags": [
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      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 6.8,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
            "version": "2.0"
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          "exploitabilityScore": 8.6,
          "impactScore": 6.4,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 5.9
        }
      },
      "lastModifiedDate": "2020-01-31T16:02Z",
      "publishedDate": "2020-01-23T23:15Z"
    }
  }
}


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