CVE-2026-103339 PUBLISHED

WordPress Metform plugin <= 4.3.0 - Cross Site Scripting (XSS) vulnerability

Assigner: Patchstack
Reserved: 30.09.2026 Published: 01.10.2026 Updated: 01.10.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
CVSS Score: 6.5

Attack Vector	Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	Low
Privileges Required	Low	Integrity Impact	Low
User Interaction	Required	Availability Impact	Low

CVSS 3.1

Product Status

Vendor	Wpmet
Product	Metform
Versions	Default: unaffected affected from 0 to 4.3.0 (incl.)

Solutions

Update the WordPress Metform plugin to the latest available version (at least 4.3.1).

Credits

Intrudify | Patchstack Bug Bounty Program finder

References

https://patchstack.com/database/wordpress/plugin/metform/vulnerability/wordpress-metform-plugin-4-3-0-cross-site-scripting-xss-vulnerability?_s_id=cve

Problem Types

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') CWE

Impacts

Stored XSS