---
id: CVE-2026-103339
title: >-
  Improper Neutralization of Input During Web Page Generation ('Cross-site
  Scripting') vulnerability in Wpmet Metform metform allows Stored XSS.This
  issue affects Metform: from n/a through 4.3.0.
summary: >-
  Improper Neutralization of Input During Web Page Generation ('Cross-site
  Scripting') vulnerability in Wpmet Metform metform allows Stored XSS.This
  issue affects Metform: from n/a through 4.3.0.
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L'
cwe:
  - CWE-79
vendor: Wpmet
product: metform
affected:
  - metform <= 4.3.0
published: '2026-10-01'
updated: '2026-10-01'
sourceUpdated: '2026-10-01T14:34:35.357'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-103339'
references:
  - url: >-
      https://patchstack.com/database/wordpress/plugin/metform/vulnerability/wordpress-metform-plugin-4-3-0-cross-site-scripting-xss-vulnerability?_s_id=cve
    label: audit@patchstack.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-01T13:11:39.506878Z'
ingestedAt: '2026-10-01T13:44:55.829Z'
---

## Overview

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Wpmet Metform metform allows Stored XSS.This issue affects Metform: from n/a through 4.3.0.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.