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CVE-2026-116858— WordPress Forminator plugin <= 1.58.3 - Content Injection vulnerability

Quick assessment

Affected
WPMU DEV Forminator
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.

WPMU DEV Forminator 插件中存在“网页中脚本相关 HTML 标签未正确中和（基础跨站脚本，XSS）”漏洞，该漏洞可导致代码注入。此问题影响 Forminator 插件的所有版本，从未知版本（n/a）至 1.58.3 版本。

CVSS 4.3 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
WPMU DEV Forminator ≤ 1.58.3 affected
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I. Basic Information for CVE-2026-116858

Vulnerability Information
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Vulnerability Title
WordPress Forminator plugin <= 1.58.3 - Content Injection vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in WPMU DEV Forminator forminator allows Code Injection.This issue affects Forminator: from n/a through 1.58.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
Web页面中脚本相关HTML标签转义处理不恰当(基本跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
WPMU DEV Forminator 0 ~ 1.58.3 -

II. Public POCs for CVE-2026-116858

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III. Intelligence Information for CVE-2026-116858

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Other References for CVE-2026-116858 (1)

IV. Related Vulnerabilities

Same product: Forminator
Same vendor: WPMU DEV
Same weakness: CWE-80