{
  "_links": {
    "capec": {
      "href": "/api/v1/vulnerability/cve-2021-34473/capec"
    },
    "cvss": {
      "href": "/api/v1/vulnerability/cve-2021-34473/cvss"
    },
    "cwe": {
      "href": "/api/v1/vulnerability/cve-2021-34473/cwe"
    },
    "enrichment": {
      "href": "/api/v1/vulnerability/cve-2021-34473/enrichment"
    },
    "gcve": {
      "href": "/api/v1/vulnerability/cve-2021-34473/gcve"
    },
    "self": {
      "href": "/api/v1/vulnerability/cve-2021-34473"
    },
    "sightings": {
      "href": "/api/v1/sightings/cve-2021-34473"
    }
  },
  "enrichments": {
    "cisa-kev": {
      "kev": true
    },
    "epss": {
      "epss": 0.99999,
      "kev": true,
      "percentile": 0.99997
    },
    "nuclei": {
      "nuclei": true,
      "nuclei_template": "http/cves/2021/CVE-2021-34473.yaml",
      "nuclei_template_severity": "critical",
      "nuclei_template_yaml": "id: CVE-2021-34473\n\ninfo:\n  name: Exchange Server - Remote Code Execution\n  author: arcc,intx0x80,dwisiswant0,r3dg33k\n  severity: critical\n  description: |\n    Microsoft Exchange Server is vulnerable to a remote code execution vulnerability. This CVE ID is unique from CVE-2021-31196, CVE-2021-31206.\n  impact: |\n    Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code on the affected Exchange Server, potentially leading to a complete compromise of the system.\n  remediation: Apply Microsoft Exchange Server 2019 Cumulative Update 9 or upgrade to the latest version.\n  reference:\n    - https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34473\n    - https://blog.orange.tw/2021/08/proxylogon-a-new-attack-surface-on-ms-exchange-part-1.html\n    - https://peterjson.medium.com/reproducing-the-proxyshell-pwn2own-exploit-49743a4ea9a1\n    - https://nvd.nist.gov/vuln/detail/CVE-2021-34473\n    - https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34473\n  classification:\n    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N\n    cvss-score: 9.1\n    cve-id: CVE-2021-34473\n    cwe-id: CWE-918\n    epss-score: 0.99999\n    epss-percentile: 0.99997\n    cpe: cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_23:*:*:*:*:*:*\n  metadata:\n    max-request: 2\n    vendor: microsoft\n    product: exchange_server\n    shodan-query:\n      - vuln:cve-2021-26855\n      - http.favicon.hash:1768726119\n      - http.title:\"outlook\"\n      - cpe:\"cpe:2.3:a:microsoft:exchange_server\"\n    fofa-query:\n      - title=\"outlook\"\n      - icon_hash=1768726119\n    google-query: intitle:\"outlook\"\n  tags: cve2021,cve,ssrf,rce,exchange,kev,microsoft,vkev,vuln\n\nhttp:\n  - method: GET\n    path:\n      - '{{BaseURL}}/autodiscover/autodiscover.json?@test.com/owa/?&Email=autodiscover/autodiscover.json%3F@test.com'\n      - '{{BaseURL}}/autodiscover/autodiscover.json?@test.com/mapi/nspi/?&Email=autodiscover/autodiscover.json%3F@test.com'\n\n    matchers:\n      - type: word\n        part: body\n        words:\n          - \"Microsoft.Exchange.Clients.Owa2.Server.Core.OwaADUserNotFoundException\"\n          - \"Exchange MAPI/HTTP Connectivity Endpoint\"\n        condition: or\n# digest: 4a0a0047304502204d02c89207fa36717cd2826b0886b6757f6c7f74c6bbf32f1c891200a6b66663022100d7f8cdb9e4f9b0b112cda2cbaef97e143edebf2cf0a97fb3b267a543a440d65e:922c64590222798bb761d5b6d8e72950"
    }
  },
  "vuln_id": "cve-2021-34473"
}