Advanced Form Integration <= 2.6.0 - Missing Authorization to Authenticated (Subscriber+) Arbitrary MailUp OAuth Token Overwrite via auth_redirect() Function

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-16587",
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "dateUpdated": "2026-07-28T05:39:44.028Z",
    "dateReserved": "2026-07-22T13:47:06.150Z",
    "datePublished": "2026-07-28T05:39:44.028Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence",
        "dateUpdated": "2026-07-28T05:39:44.028Z"
      },
      "title": "Advanced Form Integration <= 2.6.0 - Missing Authorization to Authenticated (Subscriber+) Arbitrary MailUp OAuth Token Overwrite via auth_redirect() Function",
      "descriptions": [
        {
          "lang": "en",
          "value": "The Advanced Form Integration — Connect Forms to 200+ Apps plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.6.0. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to overwrite the site's stored MailUp OAuth tokens in the adfoin_mailup_keys option with attacker-controlled tokens, hijacking future form-submission data to a MailUp account they control or nulling the tokens to break the integration entirely. This is exploitable by any authenticated user who can reach /wp-admin/profile.php, as admin_init fires for all logged-in users visiting any wp-admin page."
        }
      ],
      "affected": [
        {
          "vendor": "nasirahmed",
          "product": "Advanced Form Integration — Connect Forms to 200+ Apps",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "2.6.0"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "CWE-862 Missing Authorization",
              "cweId": "CWE-862",
              "type": "CWE"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/af913bb1-eff6-47cd-9471-f74bafda1e52?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/advanced-form-integration/tags/2.6.0/platforms/mailup/mailup.php#L98"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/advanced-form-integration/tags/2.6.0/platforms/mailup/mailup.php#L51"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/advanced-form-integration/tags/2.6.0/platforms/mailup/mailup.php#L375"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/advanced-form-integration/tags/2.6.0/platforms/mailup/mailup.php#L411"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset?reponame=&old=3621411%40advanced-form-integration&new=3621411%40advanced-form-integration"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "version": "3.1",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM"
          }
        }
      ],
      "timeline": [
        {
          "time": "2026-07-22T14:02:53.000Z",
          "lang": "en",
          "value": "Vendor Notified"
        },
        {
          "time": "2026-07-27T16:35:52.000Z",
          "lang": "en",
          "value": "Disclosed"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Wordfence PRISM",
          "type": "finder"
        }
      ]
    }
  }
}