CVE-2023-43665 (GCVE-0-2023-43665)

Vulnerability from cvelistv5 – Published: 2023-11-03 00:00 – Updated: 2025-11-04 17:12
VLAI
Summary
In Django 3.2 before 3.2.22, 4.1 before 4.1.12, and 4.2 before 4.2.6, the django.utils.text.Truncator chars() and words() methods (when used with html=True) are subject to a potential DoS (denial of service) attack via certain inputs with very long, potentially malformed HTML text. The chars() and words() methods are used to implement the truncatechars_html and truncatewords_html template filters, which are thus also vulnerable. NOTE: this issue exists because of an incomplete fix for CVE-2019-14232.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • n/a
Assigner
References
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-04T17:12:41.936Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://groups.google.com/forum/#%21forum/django-announce"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://docs.djangoproject.com/en/4.2/releases/security/"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.djangoproject.com/weblog/2023/oct/04/security-releases/"
          },
          {
            "name": "FEDORA-2023-a67af7d8f4",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HJFRPUHDYJHBH3KYHSPGULQM4JN7BMSU/"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20231221-0001/"
          },
          {
            "name": "FEDORA-2024-84fbbbb914",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZQJOMNRMVPCN5WMIZ7YSX5LQ7IR2NY4D/"
          },
          {
            "name": "[oss-security] 20240304 Django: CVE-2024-27351: Potential regular expression denial-of-service in django.utils.text.Truncator.words()",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2024/03/04/1"
          },
          {
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZQJOMNRMVPCN5WMIZ7YSX5LQ7IR2NY4D/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In Django 3.2 before 3.2.22, 4.1 before 4.1.12, and 4.2 before 4.2.6, the django.utils.text.Truncator chars() and words() methods (when used with html=True) are subject to a potential DoS (denial of service) attack via certain inputs with very long, potentially malformed HTML text. The chars() and words() methods are used to implement the truncatechars_html and truncatewords_html template filters, which are thus also vulnerable. NOTE: this issue exists because of an incomplete fix for CVE-2019-14232."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-05-01T17:09:51.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://groups.google.com/forum/#%21forum/django-announce"
        },
        {
          "url": "https://docs.djangoproject.com/en/4.2/releases/security/"
        },
        {
          "url": "https://www.djangoproject.com/weblog/2023/oct/04/security-releases/"
        },
        {
          "name": "FEDORA-2023-a67af7d8f4",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HJFRPUHDYJHBH3KYHSPGULQM4JN7BMSU/"
        },
        {
          "url": "https://security.netapp.com/advisory/ntap-20231221-0001/"
        },
        {
          "name": "FEDORA-2024-84fbbbb914",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZQJOMNRMVPCN5WMIZ7YSX5LQ7IR2NY4D/"
        },
        {
          "name": "[oss-security] 20240304 Django: CVE-2024-27351: Potential regular expression denial-of-service in django.utils.text.Truncator.words()",
          "tags": [
            "mailing-list"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2024/03/04/1"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2023-43665",
    "datePublished": "2023-11-03T00:00:00.000Z",
    "dateReserved": "2023-09-20T00:00:00.000Z",
    "dateUpdated": "2025-11-04T17:12:41.936Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2023-43665",
      "date": "2026-07-23",
      "epss": "0.01225",
      "percentile": "0.65663"
    },
    "fkie_nvd": {
      "configurations": "[{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"3.2\", \"versionEndExcluding\": \"3.2.22\", \"matchCriteriaId\": \"8BA393E1-3182-4225-9C9E-9ADEFDB870B5\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"4.1\", \"versionEndExcluding\": \"4.1.12\", \"matchCriteriaId\": \"D6A68CC8-3ABF-4E38-97AB-9AE50A6FBACF\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"4.2\", \"versionEndExcluding\": \"4.2.6\", \"matchCriteriaId\": \"80AE2E8A-697C-4495-84C0-A439EAA7D657\"}]}]}, {\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"B8EDB836-4E6A-4B71-B9B2-AA3E03E0F646\"}]}]}]",
      "descriptions": "[{\"lang\": \"en\", \"value\": \"In Django 3.2 before 3.2.22, 4.1 before 4.1.12, and 4.2 before 4.2.6, the django.utils.text.Truncator chars() and words() methods (when used with html=True) are subject to a potential DoS (denial of service) attack via certain inputs with very long, potentially malformed HTML text. The chars() and words() methods are used to implement the truncatechars_html and truncatewords_html template filters, which are thus also vulnerable. NOTE: this issue exists because of an incomplete fix for CVE-2019-14232.\"}, {\"lang\": \"es\", \"value\": \"En Django 3.2 anterior a 3.2.22, 4.1 anterior a 4.1.12 y 4.2 anterior a 4.2.6, los m\\u00e9todos django.utils.text.Truncator chars() y palabras() (cuando se usan con html=True) est\\u00e1n sujetos a un potencial Ataque DoS (denegaci\\u00f3n de servicio) a trav\\u00e9s de ciertas entradas con texto HTML muy largo y potencialmente mal formado. Los m\\u00e9todos chars() y palabras() se utilizan para implementar los filtros de plantilla truncatechars_html y truncatewords_html, que por tanto tambi\\u00e9n son vulnerables. NOTA: este problema existe debido a una soluci\\u00f3n incompleta para CVE-2019-14232.\"}]",
      "id": "CVE-2023-43665",
      "lastModified": "2024-11-21T08:24:34.663",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"baseScore\": 7.5, \"baseSeverity\": \"HIGH\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 3.9, \"impactScore\": 3.6}]}",
      "published": "2023-11-03T05:15:30.047",
      "references": "[{\"url\": \"http://www.openwall.com/lists/oss-security/2024/03/04/1\", \"source\": \"cve@mitre.org\"}, {\"url\": \"https://docs.djangoproject.com/en/4.2/releases/security/\", \"source\": \"cve@mitre.org\", \"tags\": [\"Patch\", \"Vendor Advisory\"]}, {\"url\": \"https://groups.google.com/forum/#%21forum/django-announce\", \"source\": \"cve@mitre.org\", \"tags\": [\"Permissions Required\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HJFRPUHDYJHBH3KYHSPGULQM4JN7BMSU/\", \"source\": \"cve@mitre.org\", \"tags\": [\"Mailing List\", \"Third Party Advisory\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZQJOMNRMVPCN5WMIZ7YSX5LQ7IR2NY4D/\", \"source\": \"cve@mitre.org\"}, {\"url\": \"https://security.netapp.com/advisory/ntap-20231221-0001/\", \"source\": \"cve@mitre.org\"}, {\"url\": \"https://www.djangoproject.com/weblog/2023/oct/04/security-releases/\", \"source\": \"cve@mitre.org\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/03/04/1\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://docs.djangoproject.com/en/4.2/releases/security/\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\", \"Vendor Advisory\"]}, {\"url\": \"https://groups.google.com/forum/#%21forum/django-announce\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Permissions Required\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HJFRPUHDYJHBH3KYHSPGULQM4JN7BMSU/\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Mailing List\", \"Third Party Advisory\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZQJOMNRMVPCN5WMIZ7YSX5LQ7IR2NY4D/\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://security.netapp.com/advisory/ntap-20231221-0001/\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://www.djangoproject.com/weblog/2023/oct/04/security-releases/\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Vendor Advisory\"]}]",
      "sourceIdentifier": "cve@mitre.org",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-1284\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-43665\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2023-11-03T05:15:30.047\",\"lastModified\":\"2026-06-17T06:26:11.360\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In Django 3.2 before 3.2.22, 4.1 before 4.1.12, and 4.2 before 4.2.6, the django.utils.text.Truncator chars() and words() methods (when used with html=True) are subject to a potential DoS (denial of service) attack via certain inputs with very long, potentially malformed HTML text. The chars() and words() methods are used to implement the truncatechars_html and truncatewords_html template filters, which are thus also vulnerable. NOTE: this issue exists because of an incomplete fix for CVE-2019-14232.\"},{\"lang\":\"es\",\"value\":\"En Django 3.2 anterior a 3.2.22, 4.1 anterior a 4.1.12 y 4.2 anterior a 4.2.6, los m\u00e9todos django.utils.text.Truncator chars() y palabras() (cuando se usan con html=True) est\u00e1n sujetos a un potencial Ataque DoS (denegaci\u00f3n de servicio) a trav\u00e9s de ciertas entradas con texto HTML muy largo y potencialmente mal formado. Los m\u00e9todos chars() y palabras() se utilizan para implementar los filtros de plantilla truncatechars_html y truncatewords_html, que por tanto tambi\u00e9n son vulnerables. NOTA: este problema existe debido a una soluci\u00f3n incompleta para CVE-2019-14232.\"}],\"affected\":[{\"source\":\"cve@mitre.org\",\"affectedData\":[{\"vendor\":\"n/a\",\"product\":\"n/a\",\"versions\":[{\"version\":\"n/a\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-1284\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.2\",\"versionEndExcluding\":\"3.2.22\",\"matchCriteriaId\":\"8BA393E1-3182-4225-9C9E-9ADEFDB870B5\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.1\",\"versionEndExcluding\":\"4.1.12\",\"matchCriteriaId\":\"D6A68CC8-3ABF-4E38-97AB-9AE50A6FBACF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.2\",\"versionEndExcluding\":\"4.2.6\",\"matchCriteriaId\":\"80AE2E8A-697C-4495-84C0-A439EAA7D657\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"B8EDB836-4E6A-4B71-B9B2-AA3E03E0F646\"}]}]}],\"references\":[{\"url\":\"http://www.openwall.com/lists/oss-security/2024/03/04/1\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://docs.djangoproject.com/en/4.2/releases/security/\",\"source\":\"cve@mitre.org\",\"tags\":[\"Patch\",\"Vendor Advisory\"]},{\"url\":\"https://groups.google.com/forum/#%21forum/django-announce\",\"source\":\"cve@mitre.org\",\"tags\":[\"Permissions Required\"]},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HJFRPUHDYJHBH3KYHSPGULQM4JN7BMSU/\",\"source\":\"cve@mitre.org\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZQJOMNRMVPCN5WMIZ7YSX5LQ7IR2NY4D/\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://security.netapp.com/advisory/ntap-20231221-0001/\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://www.djangoproject.com/weblog/2023/oct/04/security-releases/\",\"source\":\"cve@mitre.org\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"http://www.openwall.com/lists/oss-security/2024/03/04/1\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://docs.djangoproject.com/en/4.2/releases/security/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Vendor Advisory\"]},{\"url\":\"https://groups.google.com/forum/#%21forum/django-announce\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Permissions Required\"]},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HJFRPUHDYJHBH3KYHSPGULQM4JN7BMSU/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZQJOMNRMVPCN5WMIZ7YSX5LQ7IR2NY4D/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZQJOMNRMVPCN5WMIZ7YSX5LQ7IR2NY4D/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://security.netapp.com/advisory/ntap-20231221-0001/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://www.djangoproject.com/weblog/2023/oct/04/security-releases/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-03-20T01:37:50+00:00",
      "cve": "CVE-2023-43665",
      "id": "CVE-2023-43665",
      "initial_release_date": "2023-10-04T15:00:00+00:00",
      "product_status:fixed": "22",
      "product_status:known_affected": "12",
      "product_status:known_not_affected": "2293",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "python-django: Denial-of-service possibility in django.utils.text.Truncator",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-43665.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-15T20:13:03Z",
      "cve": "CVE-2023-43665",
      "id": "CVE-2023-43665",
      "initial_release_date": "2023-10-06T01:45:16Z",
      "product_status:recommended": "28",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-43665",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-43665.json",
      "version": "18"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.

Sightings

Author Source Type Date Other

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.


Detection rules are retrieved from Rulezet.