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CVE-2026-103339— WordPress Metform plugin <= 4.3.0 - Cross Site Scripting (XSS) vulnerability

Quick assessment

Affected
Wpmet Metform
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Wpmet Metform 插件中的“在生成网页时未正确中和输入（跨站脚本攻击，XSS）”漏洞允许存储型 XSS 攻击。该问题影响 Metform：从未知版本至 4.3.0（含）。

CVSS 6.5 · Medium EPSS 0.13% · P2

Affected Version Matrix 1

VendorProduct Version RangeStatus
Wpmet Metform ≤ 4.3.0 affected
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I. Basic Information for CVE-2026-103339

Vulnerability Information
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Vulnerability Title
WordPress Metform plugin <= 4.3.0 - Cross Site Scripting (XSS) vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Wpmet Metform 0 ~ 4.3.0 -

II. Public POCs for CVE-2026-103339

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III. Intelligence Information for CVE-2026-103339

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Other References for CVE-2026-103339 (1)

Same Patch Batch · Wpmet · 2026-10-01 · 3 CVEs total

CVE-2026-103064 6.5 MEDIUM WordPress ElementsKit Elementor addons Lite plugin <= 4.0.6 - Cross Site Scripting (XSS) v
CVE-2026-103063 6.5 MEDIUM WordPress ElementsKit Elementor addons Lite plugin <= 4.0.6 - Cross Site Scripting (XSS) v

IV. Related Vulnerabilities

Same product: Metform
Same vendor: Wpmet
Same weakness: CWE-79

V. Comments for CVE-2026-103339

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