{
  "crds_version": "0.1",
  "kind": "base",
  "id": "crds:cve-2025-53771",
  "revision": 1,
  "title": "SharePoint — Authentication Flaw Left Open by the First Fix",
  "summary": "The same SharePoint authentication weakness, still reachable after the first round of updates, letting an unauthorized attacker present themselves as another party.",
  "source_type": "cve",
  "severity": "medium",
  "cvss": {
    "score": 6.5,
    "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
    "version": "3.1"
  },
  "epss": 0.99911,
  "exploitation": {
    "known_exploited": false,
    "exploit_available": false,
    "attack_complexity": "low",
    "prerequisites": "Network access to the farm"
  },
  "remediation": {
    "patch_available": true
  },
  "mitre_attack": [
    "T1190",
    "T1078"
  ],
  "kill_chain": "initial_access",
  "recommended_action": "Apply the follow-up SharePoint update; the earlier one did not fully close this.",
  "confidence": "high",
  "provenance": [
    {
      "fields": [
        "cvss",
        "exploitation.attack_complexity",
        "exploitation.exploit_available",
        "references",
        "published_at"
      ],
      "source": "https://nvd.nist.gov/vuln/detail/CVE-2025-53771",
      "retrieved_at": "2026-08-07T16:57:17.024Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "epss"
      ],
      "source": "https://api.first.org/data/v1/epss?cve=CVE-2025-53771",
      "retrieved_at": "2026-08-07T16:57:17.024Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "title",
        "summary",
        "severity",
        "remediation",
        "mitre_attack",
        "kill_chain",
        "recommended_action",
        "confidence",
        "tags",
        "exploitation.prerequisites"
      ],
      "source": "https://nvd.nist.gov/vuln/detail/CVE-2025-53771",
      "retrieved_at": "2026-08-07T16:57:17.024Z",
      "confidence": "high",
      "extractor": "claude-code"
    }
  ],
  "references": [
    {
      "type": "cve",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-53771",
      "label": "NVD record"
    },
    {
      "type": "vendor_advisory",
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53771"
    }
  ],
  "published_at": "2025-07-20T23:15:31.807Z",
  "issued_at": "2026-08-07T16:57:17.024Z",
  "tags": [
    "microsoft-sharepoint",
    "authentication",
    "spoofing"
  ]
}