TI-2026-57872 Aliases CVE-2026-84151 GHSA-93v8-jc63-2mm4

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

LOW 16CWE-79Published 2026-09-24 · Updated 2026-09-24

Key facts

Attack vector: Network
Privileges required: High
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00158 4th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA

Fix Fixed The Post Grid (Unknown): 7.9.5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Unknown	The Post Grid	before 7.9.5	7.9.5	Patch available	CNA

The Post Grid VendorUnknown Affected before 7.9.5 Fixed in 7.9.5 Patch available CNA

Remediation

Fix · CNA The Post Grid (Unknown) Fixed in 7.9.5

Timeline

2026-10-02 Threatist record created from CVE-2026-84151
2026-10-03 Alias added: GHSA-93v8-jc63-2mm4

References

Exploit 1

https://wpscan.com/vulnerability/6601a305-a76f-40fe-8d78-c6a33a66d5f3/

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences