CVE-2026-18146 (GCVE-0-2026-18146)
Vulnerability from cvelistv5
Published
2026-08-13 06:38
Modified
2026-08-13 13:00
Severity ?
7.2 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Summary
The Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Notification Smartcode Values in all versions up to, and including, 6.2.11 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that execute in the browser of an administrator (or any user with the Fluent Forms entry-viewing capability) when they view the form's entry Submission Logs in the WordPress admin dashboard. Exploitation requires that a site administrator or Fluent Forms manager has configured an email notification whose subject or static (direct) Send To value references an attacker-influenced Smartcode such as an input_password field value, a cookie value, or submission.response.
References
Impacted products
Vendor Product Version
wpmanageninja Fluent Forms – Customizable Contact Forms, Survey, Quiz, & Conversational Form Builder Version: 0   ≤ 6.2.11
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-18146",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-13T13:00:41.828651Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-13T13:00:48.626Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Fluent Forms \u2013 Customizable Contact Forms, Survey, Quiz, \u0026 Conversational Form Builder",
          "vendor": "wpmanageninja",
          "versions": [
            {
              "lessThanOrEqual": "6.2.11",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Adrien Brunner"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Fluent Forms \u2013 Customizable Contact Forms, Survey, Quiz, \u0026 Conversational Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Notification Smartcode Values in all versions up to, and including, 6.2.11 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that execute in the browser of an administrator (or any user with the Fluent Forms entry-viewing capability) when they view the form\u0027s entry Submission Logs in the WordPress admin dashboard. Exploitation requires that a site administrator or Fluent Forms manager has configured an email notification whose subject or static (direct) Send To value references an attacker-influenced Smartcode such as an input_password field value, a cookie value, or submission.response."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-13T06:38:30.491Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/643f92e2-b14e-4056-97fc-1c631027c54f?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/fluentform/tags/6.2.8/app/Services/FormBuilder/Notifications/EmailNotification.php#L196"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/fluentform/tags/6.2.8/boot/globals.php#L98"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/fluentform/tags/6.2.8/app/Services/FormBuilder/ShortCodeParser.php#L145"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/fluentform/tags/6.2.8/app/Services/FormBuilder/ShortCodeParser.php#L142"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/fluentform/tags/6.2.8/assets/js/form_entries.js#L2"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset?reponame=\u0026new=3640683%40fluentform%2Ftags%2F6.2.12\u0026old=3632883%40fluentform%2Ftags%2F6.2.11"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset/3640683/fluentform/trunk/app/Services/FormBuilder/ShortCodeParser.php"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset?old_path=%2Ffluentform/tags/6.2.11\u0026new_path=%2Ffluentform/tags/6.2.12"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-07-28T19:13:22.000Z",
          "value": "Vendor Notified"
        },
        {
          "lang": "en",
          "time": "2026-08-12T18:34:04.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "Fluent Forms \u003c= 6.2.11 - Unauthenticated Stored Cross-Site Scripting via Notification Smartcode Values"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-18146",
    "datePublished": "2026-08-13T06:38:30.491Z",
    "dateReserved": "2026-07-28T18:58:05.758Z",
    "dateUpdated": "2026-08-13T13:00:48.626Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-18146\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-08-13T13:00:41.828651Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-08-13T13:00:45.518Z\"}}], \"cna\": {\"title\": \"Fluent Forms \u003c= 6.2.11 - Unauthenticated Stored Cross-Site Scripting via Notification Smartcode Values\", \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Adrien Brunner\"}], \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7.2, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N\"}}], \"affected\": [{\"vendor\": \"wpmanageninja\", \"product\": \"Fluent Forms \\u2013 Customizable Contact Forms, Survey, Quiz, \u0026 Conversational Form Builder\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.2.11\"}], \"defaultStatus\": \"unaffected\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-07-28T19:13:22.000Z\", \"value\": \"Vendor Notified\"}, {\"lang\": \"en\", \"time\": \"2026-08-12T18:34:04.000Z\", \"value\": \"Disclosed\"}], \"references\": [{\"url\": \"https://www.wordfence.com/threat-intel/vulnerabilities/id/643f92e2-b14e-4056-97fc-1c631027c54f?source=cve\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/fluentform/tags/6.2.8/app/Services/FormBuilder/Notifications/EmailNotification.php#L196\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/fluentform/tags/6.2.8/boot/globals.php#L98\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/fluentform/tags/6.2.8/app/Services/FormBuilder/ShortCodeParser.php#L145\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/fluentform/tags/6.2.8/app/Services/FormBuilder/ShortCodeParser.php#L142\"}, {\"url\": \"https://plugins.trac.wordpress.org/browser/fluentform/tags/6.2.8/assets/js/form_entries.js#L2\"}, {\"url\": \"https://plugins.trac.wordpress.org/changeset?reponame=\u0026new=3640683%40fluentform%2Ftags%2F6.2.12\u0026old=3632883%40fluentform%2Ftags%2F6.2.11\"}, {\"url\": \"https://plugins.trac.wordpress.org/changeset/3640683/fluentform/trunk/app/Services/FormBuilder/ShortCodeParser.php\"}, {\"url\": \"https://plugins.trac.wordpress.org/changeset?old_path=%2Ffluentform/tags/6.2.11\u0026new_path=%2Ffluentform/tags/6.2.12\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"The Fluent Forms \\u2013 Customizable Contact Forms, Survey, Quiz, \u0026 Conversational Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Notification Smartcode Values in all versions up to, and including, 6.2.11 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that execute in the browser of an administrator (or any user with the Fluent Forms entry-viewing capability) when they view the form\u0027s entry Submission Logs in the WordPress admin dashboard. Exploitation requires that a site administrator or Fluent Forms manager has configured an email notification whose subject or static (direct) Send To value references an attacker-influenced Smartcode such as an input_password field value, a cookie value, or submission.response.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-79\", \"description\": \"CWE-79 Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"b15e7b5b-3da4-40ae-a43c-f7aa60e62599\", \"shortName\": \"Wordfence\", \"dateUpdated\": \"2026-08-13T06:38:30.491Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-18146\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-13T13:00:48.626Z\", \"dateReserved\": \"2026-07-28T18:58:05.758Z\", \"assignerOrgId\": \"b15e7b5b-3da4-40ae-a43c-f7aa60e62599\", \"datePublished\": \"2026-08-13T06:38:30.491Z\", \"assignerShortName\": \"Wordfence\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.