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Ultimate Member <= 2.13.1 - Missing Authorization to Unauthenticated Sensitive Profile Field Disclosure via Member Directory Field Privacy Bypass

Type: advisorySources: OSV

The Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.13.1 This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to view privacy-restricted member profile field values — including fields explicitly configured as owner-only, members-only, or role-restricted — by querying the publicly accessible wp_ajax_nopriv_um_get_members endpoint. The nonce required by the endpoint ('um-frontend-nonce') is emitted to all unauthenticated visitors via wp_localize_script, meaning it provides no meaningful access control and any anonymous visitor can satisfy the endpoint's authentication requirements.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-93428
Confirmed fixed CVEs
Not specified
Updated in this feed
3 Nov 2026, 16:13 UTC · Revision 1

Source evidence

Ultimate Member <= 2.13.1 - Missing Authorization to Unauthenticated Sensitive Profile Field Disclosure via Member Directory Field Privacy Bypass

core-osv · Original source

Published 3 Oct 2026, 02:25 UTC

The Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.13.1 This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to view privacy-restricted member profile field values — including fields explicitly configured as owner-only, members-only, or role-restricted — by querying the publicly accessible wp_ajax_nopriv_um_get_members endpoint. The nonce required by the endpoint ('um-frontend-nonce') is emitted to all unauthenticated visitors via wp_localize_script, meaning it provides no meaningful access control and any anonymous visitor can satisfy the endpoint's authentication requirements.

osv:CVE-2026-93428
Complete source record
{
  "id": "98845c8eb84b3f2b05f84b47e316bae496cae65351816d0762276b33759fb244",
  "url": "https://osv.dev/vulnerability/CVE-2026-93428",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Ultimate Member <= 2.13.1 - Missing Authorization to Unauthenticated Sensitive Profile Field Disclosure via Member Directory Field Privacy Bypass",
    "summary": "The Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.13.1 This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to view privacy-restricted member profile field values — including fields explicitly configured as owner-only, members-only, or role-restricted — by querying the publicly accessible wp_ajax_nopriv_um_get_members endpoint. The nonce required by the endpoint ('um-frontend-nonce') is emitted to all unauthenticated visitors via wp_localize_script, meaning it provides no meaningful access control and any anonymous visitor can satisfy the endpoint's authentication requirements.",
    "evidence": "osv:CVE-2026-93428",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-93428",
      "aliases": [
        "CVE-2026-93428"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/ultimatemember/ultimatemember",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "fc07436d566c0a297e06d6504f2a60b9b2db7e63"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.13.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "fc07436d566c0a297e06d6504f2a60b9b2db7e63"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "2.14.0"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.8.9",
            "2.8.8",
            "2.8.7",
            "2.8.6",
            "2.8.5",
            "2.8.4",
            "2.8.3",
            "2.8.2",
            "2.8.1",
            "2.8.0",
            "2.7.0",
            "2.6.11",
            "2.6.10",
            "2.6.9",
            "2.6.8",
            "2.6.7",
            "2.6.6",
            "2.6.5",
            "2.6.4",
            "2.6.3",
            "2.6.2",
            "2.6.1",
            "2.6.0",
            "2.5.4",
            "2.5.3",
            "2.5.2",
            "2.5.1",
            "2.5.0",
            "2.4.2",
            "2.4.1",
            "2.4.0",
            "2.3.2",
            "2.3.1",
            "2.3.0",
            "2.2.5",
            "2.2.4",
            "2.2.3",
            "2.2.2",
            "2.2.1",
            "2.2.0",
            "2.1.20",
            "2.1.19",
            "2.1.18",
            "2.1.17",
            "2.1.16",
            "2.1.15",
            "2.1.14",
            "2.1.13",
            "2.1.12",
            "2.1.11",
            "2.1.10",
            "2.1.9",
            "2.1.8",
            "2.1.7",
            "2.1.6",
            "2.1.5",
            "2.1.4",
            "2.1.3",
            "2.1.3-rc.1",
            "2.1.2",
            "2.1.2-rc.1",
            "2.1.1",
            "2.1.0",
            "2.1.0-rc.2",
            "2.1.0-rc.1",
            "2.0.54",
            "2.0.53",
            "2.0.50",
            "2.0.49",
            "2.0.48",
            "2.0.47",
            "2.0.46",
            "2.0.45",
            "2.0.44",
            "2.0.43",
            "2.0.41",
            "2.0.39",
            "2.0.38",
            "2.0.37",
            "2.0.35",
            "2.0.34",
            "2.0.24",
            "2.0.17",
            "2.0.16",
            "2.0.11",
            "2.0.10",
            "2.0.9",
            "2.0.5",
            "2.0.4",
            "1.3.88",
            "1.3.88.6",
            "1.3.88.5",
            "1.3.88.4",
            "v1.3.88.3",
            "v1.3.88.2",
            "v1.3.88.1",
            "v1.3.84",
            "v1.3.83",
            "v1.3.82",
            "v1.3.81",
            "v1.3.79",
            "v1.3.78",
            "v1.3.76",
            "v1.3.75",
            "v1.3.74",
            "v1.3.73",
            "v1.3.72",
            "v1.3.71",
            "v1.3.69",
            "pre-v1.3.69.25",
            "pre-v1.3.69.24",
            "pre-v1.3.69.23",
            "pre-v1.3.69.22",
            "pre-v1.3.69.21",
            "pre-v1.3.69.20",
            "pre-v1.3.69.19",
            "pre-v1.3.69.18",
            "pre-v1.3.69.17",
            "pre-v1.3.69.16",
            "v1.3.68",
            "v1.3.67",
            "v1.3.66",
            "v1.3.65",
            "v1.3.64",
            "v1.3.63",
            "v1.3.62",
            "v1.3.61",
            "v1.3.60",
            "1.3.59",
            "v1.3.56",
            "v1.3.55",
            "v1.3.54",
            "v1.3.53",
            "v1.3.52",
            "v1.3.51",
            "pre-v1.3.50",
            "v1.3.49",
            "1.3.48",
            "v1.3.47",
            "v1.3.45",
            "v1.3.44",
            "v1.3.43",
            "v1.3.42",
            "v1.3.41",
            "v1.3.40",
            "v1.3.39",
            "v1.3.38",
            "v1.3.37",
            "v1.3.36",
            "v1.3.35",
            "v1.3.32",
            "v1.3.30",
            "v1.3.29"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93428.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:30.309334076Z",
      "provider": "osv",
      "references": [
        "https://github.com/ultimatemember/ultimatemember/releases/tag/2.14.0",
        "https://plugins.trac.wordpress.org/browser/ultimate-member/tags/2.13.1/includes/core/class-ajax-common.php#L61",
        "https://plugins.trac.wordpress.org/browser/ultimate-member/tags/2.13.1/includes/core/class-fields.php#L144",
        "https://plugins.trac.wordpress.org/browser/ultimate-member/tags/2.13.1/includes/core/class-member-directory.php#L2795",
        "https://plugins.trac.wordpress.org/browser/ultimate-member/tags/2.13.1/includes/core/class-member-directory.php#L2839",
        "https://plugins.trac.wordpress.org/browser/ultimate-member/tags/2.13.1/includes/core/um-actions-profile.php#L1319",
        "https://plugins.trac.wordpress.org/browser/ultimate-member/tags/2.13.1/includes/um-short-functions.php#L1579",
        "https://www.wordfence.com/threat-intel/vulnerabilities/id/cde81421-e080-4530-87a5-6515f1c9800b?source=cve",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93428.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-93428"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-862"
        ],
        "cna_assigner": "Wordfence",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93428.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-93428",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 497196,
  "published_at": "2026-10-03T02:25:36.239+00:00"
}