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CVE-2026-103911— Forminator Forms <= 1.58.1 - Unauthenticated Arbitrary Shortcode Execution via 's' Search Parameter and Anonymous Comment via render_block

Quick assessment

Affected
wpmudev Forminator Forms – Contact Form, Payment Form & Custom Form Builder
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.

WordPress 插件 Forminator Forms（包含联系表单、支付表单及自定义表单构建器）在所有 1.58.1 及之前的版本中，存在任意短代码执行漏洞。该漏洞源于软件在执行 do_shortcode 函数前，未对传入值进行充分验证，导致未授权攻击者可执行任意短代码。此漏洞可在任何启用区块主题（block-theme）的站点上被利用：攻击者仅需向搜索结果页面发送一次未认证的 GET 请求，或在任何启用了评论功能的文章下提交匿名评论，即可触发漏洞，且无需任何与 Forminator 相关的内容或配置。

CVSS 6.5 · Medium EPSS 0.27% · P19

Affected Version Matrix 1

VendorProduct Version RangeStatus
wpmudev Forminator Forms – Contact Form, Payment Form & Custom Form Builder ≤ 1.58.1 affected
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I. Basic Information for CVE-2026-103911

Vulnerability Information
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Vulnerability Title
Forminator Forms <= 1.58.1 - Unauthenticated Arbitrary Shortcode Execution via 's' Search Parameter and Anonymous Comment via render_block
Source: CVE Program / CVE List V5
Vulnerability Description
The The Forminator Forms – Contact Form, Payment Form & Custom Form Builder plugin for WordPress is vulnerable to arbitrary shortcode execution in all versions up to, and including, 1.58.1. This is due to the software allowing users to execute an action that does not properly validate a value before running do_shortcode. This makes it possible for unauthenticated attackers to execute arbitrary shortcodes. This is exploitable on any block-theme install via a single unauthenticated GET request to the search results page, or by submitting an anonymous comment on any post with comments enabled; no Forminator-specific content or configuration is required to trigger execution.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
wpmudev Forminator Forms – Contact Form, Payment Form & Custom Form Builder 0 ~ 1.58.1 -

II. Public POCs for CVE-2026-103911

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III. Intelligence Information for CVE-2026-103911

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Patches & Fixes for CVE-2026-103911 (1)

Vendor Advisories for CVE-2026-103911 (1)

Same Patch Batch · wpmudev · 2026-10-16 · 3 CVEs total

CVE-2026-101335 6.5 MEDIUM Forminator Forms <= 1.58.1 - Unauthenticated Arbitrary Shortcode Execution via 'User-Agent
CVE-2026-96562 6.5 MEDIUM Broken Link Checker <= 2.4.14.1 - Unauthenticated Arbitrary Shortcode Execution via parser

IV. Related Vulnerabilities

Same product: Forminator Forms – Contact Form, Payment Form & Custom Form Builder
Same vendor: wpmudev
Same weakness: CWE-94

V. Comments for CVE-2026-103911

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