GHSA-QQFQ-FG56-QV34

Vulnerability from github – Published: 2026-06-24 09:30 – Updated: 2026-06-24 09:30
VLAI
Details

The Ultimate Member plugin for WordPress is vulnerable to Account Takeover via Password Reset Link Disclosure in all versions up to and including 2.11.4. This is due to a chain of three logic bugs: (1) an MD5 hash fallback in get_directory_by_hash() that allows any post to be used as a member directory by computing SUBSTRING(MD5(post_id), 11, 5), (2) a strstr() parsing logic flaw in post_data() that allows bypassing WordPress's protected meta key restrictions by placing 'um' anywhere in the meta key name rather than at the start, and (3) missing field name validation in build_user_card_data() that allows arbitrary field names including 'password_reset_link' to be passed to um_filtered_value(). This makes it possible for authenticated attackers with Contributor-level access and above to create a malicious post via XMLRPC with crafted meta fields, use the MD5 fallback to point the member directory AJAX handler to their post, inject 'password_reset_link' into the tagline_fields configuration, and leak live password reset URLs for all users in the member directory response, including administrators.

Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-7761"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-24T08:16:24Z",
    "severity": "HIGH"
  },
  "details": "The Ultimate Member plugin for WordPress is vulnerable to Account Takeover via Password Reset Link Disclosure in all versions up to and including 2.11.4. This is due to a chain of three logic bugs: (1) an MD5 hash fallback in get_directory_by_hash() that allows any post to be used as a member directory by computing SUBSTRING(MD5(post_id), 11, 5), (2) a strstr() parsing logic flaw in post_data() that allows bypassing WordPress\u0027s protected meta key restrictions by placing \u0027_um_\u0027 anywhere in the meta key name rather than at the start, and (3) missing field name validation in build_user_card_data() that allows arbitrary field names including \u0027password_reset_link\u0027 to be passed to um_filtered_value(). This makes it possible for authenticated attackers with Contributor-level access and above to create a malicious post via XMLRPC with crafted meta fields, use the MD5 fallback to point the member directory AJAX handler to their post, inject \u0027password_reset_link\u0027 into the tagline_fields configuration, and leak live password reset URLs for all users in the member directory response, including administrators.",
  "id": "GHSA-qqfq-fg56-qv34",
  "modified": "2026-06-24T09:30:49Z",
  "published": "2026-06-24T09:30:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-7761"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/ultimate-member/tags/2.11.4/includes/core/class-member-directory.php#L2726"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/ultimate-member/tags/2.11.4/includes/core/class-member-directory.php#L289"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/ultimate-member/tags/2.11.4/includes/core/class-query.php#L439"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/ultimate-member/tags/2.11.4/includes/um-short-functions.php#L2611"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/ultimate-member/trunk/includes/core/class-member-directory.php#L2726"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/ultimate-member/trunk/includes/core/class-member-directory.php#L289"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/ultimate-member/trunk/includes/core/class-query.php#L439"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/ultimate-member/trunk/includes/um-short-functions.php#L2611"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset/3569970"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/9aff7b03-4f03-434c-be87-b10ceeb4e625?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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