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Medium

WordPress < 6.3.2 - Unauthenticated Post Author Email Disclosure

Type: advisorySources: OSV

WordPress does not properly restrict which user fields are searchable via the REST API, allowing unauthenticated attackers to discern the email addresses of users who have published public posts on an affected website via an Oracle style attack

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2023-5561
Confirmed fixed CVEs
Not specified
Updated in this feed
2 Nov 2026, 22:39 UTC · Revision 1

Source evidence

WordPress < 6.3.2 - Unauthenticated Post Author Email Disclosure

core-osv · Original source

Published 16 Oct 2023, 19:39 UTC

WordPress does not properly restrict which user fields are searchable via the REST API, allowing unauthenticated attackers to discern the email addresses of users who have published public posts on an affected website via an Oracle style attack

osv:CVE-2023-5561
Complete source record
{
  "id": "1f5b8f7b34b3399c8ac4a3329a4f7863a0a07b7796524b3094f49171ec57d1fa",
  "url": "https://osv.dev/vulnerability/CVE-2023-5561",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "WordPress < 6.3.2 - Unauthenticated Post Author Email Disclosure",
    "summary": "WordPress does not properly restrict which user fields are searchable via the REST API, allowing unauthenticated attackers to discern the email addresses of users who have published public posts on an affected website via an Oracle style attack",
    "evidence": "osv:CVE-2023-5561",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2023-5561",
      "aliases": [
        "BIT-wordpress-2023-5561",
        "BIT-wordpress-multisite-2023-5561",
        "CVE-2023-5561"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
        }
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                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/5xxx/CVE-2023-5561.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-5561",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 490623,
  "published_at": "2023-10-16T19:39:10.424+00:00"
}