CVE-2026-84151: CWE-79 Cross-Site Scripting (XSS) in The Post Grid
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.
AI Analysis
Technical Summary
CVE-2026-84151 is a CWE-79 Cross-Site Scripting vulnerability in The Post Grid WordPress plugin versions prior to 7.9.5. The plugin extends the WordPress allowed-HTML list beyond its intended scope, applying it site-wide. This flaw allows users with Contributor role and above to store HTML elements such as iframe, style, and input, which are normally stripped from user content. The injected HTML renders for any site visitor and administrators reviewing the content, enabling attacks like phishing frames, CSS defacement, and spoofed input forms.
Potential Impact
Users with Contributor role or higher can inject malicious HTML elements that affect all visitors and administrators. This can lead to phishing attacks, visual defacement of the site, and spoofed input forms that may deceive users into submitting sensitive information.
Mitigation Recommendations
Upgrade The Post Grid plugin to version 7.9.5 or later where this vulnerability is fixed. No other mitigation guidance is provided. Patch status is not explicitly confirmed in the input, but the affected versions are stated as prior to 7.9.5, indicating that 7.9.5 is the fixed version.
CVE-2026-84151: CWE-79 Cross-Site Scripting (XSS) in The Post Grid
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.
CVSS v3.1
Score 3.5low
Affected software
The Post Grid
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-84151 is a CWE-79 Cross-Site Scripting vulnerability in The Post Grid WordPress plugin versions prior to 7.9.5. The plugin extends the WordPress allowed-HTML list beyond its intended scope, applying it site-wide. This flaw allows users with Contributor role and above to store HTML elements such as iframe, style, and input, which are normally stripped from user content. The injected HTML renders for any site visitor and administrators reviewing the content, enabling attacks like phishing frames, CSS defacement, and spoofed input forms.
Potential Impact
Users with Contributor role or higher can inject malicious HTML elements that affect all visitors and administrators. This can lead to phishing attacks, visual defacement of the site, and spoofed input forms that may deceive users into submitting sensitive information.
Mitigation Recommendations
Upgrade The Post Grid plugin to version 7.9.5 or later where this vulnerability is fixed. No other mitigation guidance is provided. Patch status is not explicitly confirmed in the input, but the affected versions are stated as prior to 7.9.5, indicating that 7.9.5 is the fixed version.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-09-01T07:35:59.908Z
- State
- PUBLISHED
Threat ID: 6ab4c0b3f7a7c54106f3a83c
Added to database: 09/24/2026, 06:18:27 UTC
Last enriched: 09/24/2026, 06:33:48 UTC
Last updated: 09/25/2026, 02:31:31 UTC
Views: 13
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