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CVE-2026-84151— The Post Grid < 7.9.5 - Contributor+ Stored HTML/iframe Injection via wp_kses_post Allow-List Widening

Quick assessment

Affected
Unknown The Post Grid
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.

Post Grid WordPress 插件在 7.9.5 版本之前，未能将其对 WordPress 允许使用的 HTML 标签列表的限制仅限定于自身插件的标记上，而是将该扩展应用于整个站点。这导致具有“Contributor”（贡献者）角色及更高级别权限的用户可以存储通常会被过滤掉的 iframe、style 和 input 等元素，从而引发 HTML 注入漏洞（例如钓鱼框架、CSS 样式篡改以及仿冒输入表单）。这些注入内容会对所有访问者生效，且管理员在审阅内容时也会看到这些恶意元素。

AI Predicted 6.1 Difficulty: Easy EPSS 0.14% · P3
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I. Basic Information for CVE-2026-84151

Vulnerability Information
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Vulnerability Title
The Post Grid < 7.9.5 - Contributor+ Stored HTML/iframe Injection via wp_kses_post Allow-List Widening
Source: CVE Program / CVE List V5
Vulnerability Description
The Post Grid WordPress plugin before 7.9.5 does not limit an expansion of the WordPress allowed-HTML list to its own markup and applies it site-wide, allowing users with the Contributor role and above to store iframe, style and input elements that are normally stripped from their content, leading to HTML injection (phishing frames, CSS defacement and spoofed input forms) that renders to any visitor and to administrators reviewing the content.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Unknown The Post Grid 0 ~ 7.9.5 -

II. Public POCs for CVE-2026-84151

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III. Intelligence Information for CVE-2026-84151

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Other References for CVE-2026-84151 (1)

Same Patch Batch · Unknown · 2026-09-24 · 16 CVEs total

CVE-2026-93662 Events Manager 7.4.1 - 7.4.4 - Subscriber+ Unpublished Event and Location Disclosure via '
CVE-2026-93661 Events Manager < 7.4.5 - Contributor+ Arbitrary Ticket Overwrite via IDOR
CVE-2026-88847 MasterStudy LMS < 3.7.50 - Subscriber+ Lesson Completion Record Creation
CVE-2026-89004 WPeMatico RSS Feed Fetcher < 2.8.26 - Contributor+ Campaign Configuration and Log Disclosu
CVE-2026-89005 WPeMatico RSS Feed Fetcher < 2.8.26 - Contributor+ Stored XSS via Word to Category
CVE-2026-89002 WPeMatico RSS Feed Fetcher < 2.8.26 - Contributor+ Stored XSS via Campaign Item Preview
CVE-2026-88843 MasterStudy LMS 3.5.29 - < 3.7.50 - Contributor+ LFI via Elementor Courses Categories Widg
CVE-2026-88846 MasterStudy LMS 2.3.0 - < 3.7.50 - Unauthenticated Account Creation with Registration Disa
CVE-2026-88845 MasterStudy LMS 2.3.0 - < 3.7.50 - Subscriber+ Course and Lesson Creation via Demo Import
CVE-2026-82195 10Web Booster < 2.34.0 - Unauthenticated Connection Secret Disclosure and Deletion
CVE-2026-82850 Masteriyo LMS < 3.4.2 - Subscriber+ Quiz Answer Key Disclosure
CVE-2026-82849 Masteriyo LMS < 3.4.2 - Subscriber+ Arbitrary User Course Progress Disclosure via IDOR
CVE-2026-74991 WPForms Lite 1.8.8.2 - 2.0.1.1 - Unauthenticated Stripe Refund and Subscription Cancellati
CVE-2026-80338 CMB2 < 2.13.0 - Subscriber+ Arbitrary Option Corruption via oEmbed Handler
CVE-2026-80513 wpForo Forum < 3.1.6 - Subscriber+ PHP Object Injection via Profile Fields

IV. Related Vulnerabilities

Same product: The Post Grid
Same vendor: Unknown

V. Comments for CVE-2026-84151

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