Security advisory

{
  "id": "557a774e816d71d24035a76dc2f4b89ce6302a93cf942465eae81beac9f51f31",
  "url": "https://osv.dev/vulnerability/CVE-2023-45367",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2023-45367",
    "summary": "An issue was discovered in the CheckUser extension for MediaWiki before 1.35.12, 1.36.x through 1.39.x before 1.39.5, and 1.40.x before 1.40.1. A user can use a rest.php/checkuser/v0/useragent-clienthints/revision/ URL to store an arbitrary number of rows in cu_useragent_clienthints, leading to a denial of service.",
    "evidence": "osv:CVE-2023-45367",
    "products": [],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2023-45367",
      "aliases": [
        "BIT-mediawiki-2023-45367",
        "CVE-2023-45367"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/wikimedia/mediawiki",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "ee574ec7a22fd0c77f86565fb6b8a31572d8b4fc"
                },
                {
                  "introduced": "bc542ec6d8573dfb906b468901799e0017875f1e"
                },
                {
                  "fixed": "1e3757f7f2e2a06ccd5c4f962753b8c9abe1fed6"
                },
                {
                  "introduced": "468dd69d6ee8e84b9ab26d0ee3d52f215faaf0d4"
                },
                {
                  "last_affected": "468dd69d6ee8e84b9ab26d0ee3d52f215faaf0d4"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.35.12"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.36.0"
                      },
                      {
                        "fixed": "1.39.5"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:mediawiki:mediawiki:1.40.0:-:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.40.0-NA"
                      },
                      {
                        "last_affected": "1.40.0-NA"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.40.0-NA",
            "1.40.0",
            "1.39.4",
            "1.35.11",
            "1.35.10",
            "1.39.3",
            "1.39.2",
            "1.39.1",
            "1.35.9",
            "1.39.0",
            "1.39.0-rc.1",
            "1.35.8",
            "1.39.0-rc.0",
            "1.35.7",
            "1.35.6",
            "1.35.5",
            "1.35.4",
            "1.35.3",
            "1.35.2",
            "1.35.1",
            "1.35.0",
            "1.35.0-rc.3",
            "1.35.0-rc.2",
            "1.35.0-rc.1",
            "1.35.0-rc.0",
            "test-hashar-for-ci",
            "1.6.0",
            "1.5.0beta4",
            "1.5.0beta3",
            "1.5.0beta2",
            "1.5.0beta1",
            "1.5.0alpha2",
            "1.5.0alpha1",
            "1.3.0beta1",
            "1.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-45367.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:49.397786972Z",
      "provider": "osv",
      "references": [
        "https://phabricator.wikimedia.org/T344923",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/45xxx/CVE-2023-45367.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-45367"
      ],
      "provider_metadata": {
        "cna_assigner": "mitre",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/45xxx/CVE-2023-45367.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-45367",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 518007,
  "published_at": "2023-10-09T00:00:00+00:00"
}