WordPress Ultimate Member plugin <= 2.13.1 - PHP Object Injection vulnerability

{
  "id": "f214842f26257f3ee5af5d15bd775b3a722e38235f29a087ae19c29c70fca7df",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-115968",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "WordPress Ultimate Member plugin <= 2.13.1 - PHP Object Injection vulnerability",
    "summary": "Deserialization of Untrusted Data vulnerability in Ultimate Member Ultimate Member ultimate-member allows Object Injection.This issue affects Ultimate Member: from n/a through 2.13.1.",
    "evidence": "cve:CVE-2026-115968",
    "products": [
      {
        "name": {
          "value": "Ultimate Member",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-115968",
      "aliases": [
        "CVE-2026-115968"
      ],
      "metrics": [
        {
          "format": "CVSS",
          "cvssV3_1": {
            "scope": "UNCHANGED",
            "version": "3.1",
            "baseScore": 9.8,
            "attackVector": "NETWORK",
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "integrityImpact": "HIGH",
            "userInteraction": "NONE",
            "attackComplexity": "LOW",
            "availabilityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "confidentialityImpact": "HIGH"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "affected": [
        {
          "vendor": "Ultimate Member",
          "product": "Ultimate Member",
          "versions": [
            {
              "status": "affected",
              "changes": [
                {
                  "at": "2.14.0",
                  "status": "unaffected"
                }
              ],
              "version": "0",
              "versionType": "custom",
              "lessThanOrEqual": "2.13.1"
            }
          ],
          "packageName": "ultimate-member",
          "collectionURL": "https://wordpress.org/plugins",
          "defaultStatus": "unaffected"
        }
      ],
      "modified": "2026-10-28T16:07:03.811Z",
      "provider": "cve",
      "references": [
        "https://patchstack.com/database/wordpress/plugin/ultimate-member/vulnerability/wordpress-ultimate-member-plugin-2-13-1-php-object-injection-vulnerability?_s_id=cve"
      ],
      "provider_metadata": {
        "adp": [
          {
            "title": "CISA ADP Vulnrichment",
            "metrics": [
              {
                "other": {
                  "type": "ssvc",
                  "content": {
                    "id": "CVE-2026-115968",
                    "role": "CISA Coordinator",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "yes"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "version": "2.0.3",
                    "timestamp": "2026-10-28T15:56:48.987963Z"
                  }
                }
              }
            ],
            "providerMetadata": {
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP",
              "dateUpdated": "2026-10-28T16:07:03.811Z"
            }
          }
        ],
        "cna": {
          "orgId": "21595511-bba5-4825-b968-b78d1f9984a3",
          "shortName": "Patchstack",
          "dateUpdated": "2026-10-28T14:02:57.496Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-115968",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 460277,
  "published_at": "2026-10-28T14:02:57.496+00:00"
}