Description
The MetForm WordPress plugin before 4.3.1 does not sanitize or escape submitted form-field values before inserting them into the HTML body of its email notifications, allowing unauthenticated attackers to inject arbitrary markup into the administrator and submitter notification emails the site sends.
Published: 2026-10-07
Score: 5.4 Medium
EPSS: < 1% Very Low
KEV: No
AI Analysis

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Remediation

No solution or workaround provided in the CVE record.

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Tracking

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Advisories

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History

Wed, 07 Oct 2026 10:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-74
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 07 Oct 2026 08:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-1070
CWE-20

Wed, 07 Oct 2026 07:00:00 +0000

Type Values Removed Values Added
Description The MetForm WordPress plugin before 4.3.1 does not sanitize or escape submitted form-field values before inserting them into the HTML body of its email notifications, allowing unauthenticated attackers to inject arbitrary markup into the administrator and submitter notification emails the site sends.
Title MetForm < 4.3.1 - Unauthenticated HTML Injection in Notification Emails via Field Shortcodes
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N'}

Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: WPScan

Published:

Updated: 2026-10-07T09:49:40.451Z

Reserved: 2026-09-08T14:32:26.457Z

Link: CVE-2026-86833

cve-icon Vulnrichment

Updated: 2026-10-07T09:49:36.187Z

cve-icon NVD

Status : Deferred

Published: 2026-10-07T07:17:01.730

Modified: 2026-10-07T14:52:43.420

Link: CVE-2026-86833

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-07T11:30:16Z

Weaknesses
  • CWE-1070

    Serializable Data Element Containing non-Serializable Item Elements

  • CWE-20

    Improper Input Validation

  • CWE-74

    Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')