CVE-2026-93755 (GCVE-0-2026-93755)
Vulnerability from cvelistv5
Published
2026-11-07 11:26
Modified
2026-11-07 11:26
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation
Summary
The Happyforms plugin for WordPress is vulnerable to Stored Cross-Site Scripting via spoofable client IP headers in versions up to, and including, 1.38.9. This is due to the happyforms_get_client_ip() function reading raw HTTP_CLIENT_IP and HTTP_X_FORWARDED_FOR request headers without any validation or sanitization, storing the value as post meta ('client_ip') via update_post_meta() during unauthenticated form submissions, and later echoing it in the admin submission edit screen's Details metabox without output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user (typically an administrator reviewing a submission) accesses an injected page.
Impacted products
Vendor Product Version
Happyforms Happyforms Pro Version: 0   ≤ 1.38.9
Create a notification for this product.
Show details on NVD website


{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Happyforms Pro",
          "vendor": "Happyforms",
          "versions": [
            {
              "lessThanOrEqual": "1.38.9",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Bao Le"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Happyforms plugin for WordPress is vulnerable to Stored Cross-Site Scripting via spoofable client IP headers in versions up to, and including, 1.38.9. This is due to the happyforms_get_client_ip() function reading raw HTTP_CLIENT_IP and HTTP_X_FORWARDED_FOR request headers without any validation or sanitization, storing the value as post meta (\u0027client_ip\u0027) via update_post_meta() during unauthenticated form submissions, and later echoing it in the admin submission edit screen\u0027s Details metabox without output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user (typically an administrator reviewing a submission) accesses an injected page."
        }
      ],
      "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",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-07T11:26:25.087Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/17e95c94-0a63-494e-b4b0-823b9cd0f7d3?source=cve"
        },
        {
          "url": "https://happyforms.io/whats-new/"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-11-06T21:54:47.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "Happyforms Pro \u003c= 1.38.9 - Unauthenticated Stored Cross-Site Scripting via Client-IP/X-Forwarded-For Header"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-93755",
    "datePublished": "2026-11-07T11:26:25.087Z",
    "dateReserved": "2026-09-18T16:36:18.236Z",
    "dateUpdated": "2026-11-07T11:26:25.087Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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