Vulnerability-Lookup

CVE-2026-19862 (GCVE-0-2026-19862)

Vulnerability from cvelistv5 – Published: 2026-09-06 09:36 – Updated: 2026-09-06 10:43

Title

JetFormBuilder < 3.6.5.2 - Unauthenticated Email Header Injection via Send Email Action

Summary

The JetFormBuilder WordPress plugin before 3.6.5.2 does not validate or strip line breaks from address values it sources from submitted form fields before adding them to the headers of the e-mails it sends, allowing unauthenticated users to inject arbitrary e-mail headers, add hidden recipients and spoof the sender. Exploitation requires the site to be configured to take one of the message's addresses from a form field.

Severity

4.8 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-06 10:41 UTC

CWE

CWE-93 Improper Neutralization of CRLF Sequences ('CRLF Injection')
CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')

Assigner

WPScan mitre root

References

1 reference

URL	Tags
https://wpscan.com/vulnerability/b3fe5552-6736-44…	exploitvdb-entrytechnical-description

Impacted products

1 product

Vendor	Product	Version	CPE status
Unknown	JetFormBuilder	Affected: 0 , < 3.6.5.2 (semver)	guessed

Credits

Emirhan Kurt WPScan

Show details on NVD website

JSON

To clipboard

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        }
      ],
      "metrics": [
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FKIE_CVE-2026-19862

Vulnerability from fkie_nvd - Published: 2026-09-06 10:17 - Updated: 2026-09-06 11:18

Severity

4.8 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Summary

References

	URL	Tags
	contact@wpscan.com	https://wpscan.com/vulnerability/b3fe5552-6736-4479-9c61-c05bc3328b8e/

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://wordpress.org/plugins",
          "defaultStatus": "unaffected",
          "product": "JetFormBuilder",
          "vendor": "Unknown",
          "versions": [
            {
              "lessThan": "3.6.5.2",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "contact@wpscan.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The JetFormBuilder WordPress plugin before 3.6.5.2 does not validate or strip line breaks from address values it sources from submitted form fields before adding them to the headers of the e-mails it sends, allowing unauthenticated users to inject arbitrary e-mail headers, add hidden recipients and spoof the sender. Exploitation requires the site to be configured to take one of the message\u0027s addresses from a form field."
    }
  ],
  "id": "CVE-2026-19862",
  "lastModified": "2026-09-06T11:18:01.190",
  "metrics": {
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      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
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          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 2.5,
        "source": "contact@wpscan.com",
        "type": "Secondary"
      }
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    "ssvcV203": [
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  "sourceIdentifier": "contact@wpscan.com",
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}

GHSA-9QRJ-JM5V-82P9

Vulnerability from github – Published: 2026-09-06 12:30 – Updated: 2026-09-06 12:30

Details

Severity

4.8 (Medium)


                  
                    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-19862"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-93"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-06T10:17:14Z",
    "severity": "MODERATE"
  },
  "details": "The JetFormBuilder WordPress plugin before 3.6.5.2 does not validate or strip line breaks from address values it sources from submitted form fields before adding them to the headers of the e-mails it sends, allowing unauthenticated users to inject arbitrary e-mail headers, add hidden recipients and spoof the sender. Exploitation requires the site to be configured to take one of the message\u0027s addresses from a form field.",
  "id": "GHSA-9qrj-jm5v-82p9",
  "modified": "2026-09-06T12:30:23Z",
  "published": "2026-09-06T12:30:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-19862"
    },
    {
      "type": "WEB",
      "url": "https://wpscan.com/vulnerability/b3fe5552-6736-4479-9c61-c05bc3328b8e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-19862 (GCVE-0-2026-19862)

FKIE_CVE-2026-19862

GHSA-9QRJ-JM5V-82P9

Tags

Sightings

Nomenclature