CVE-2023-6645 - CVE House

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Status published Medium CVE-2023-6645

Post Grid Combo – 36+ Gutenberg Blocks <= 2.2.64 - Authenticated (Contributor+) Cross-Site Scripting

6.4 CVSS

Vulnerability Description

The Post Grid Combo – 36+ Gutenberg Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the custom JS parameter in all versions up to, and including, 2.2.64 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor access or higher to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

Rafshanzani Suhada

References

More from pickplugins

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Email Verification, Email OTP, Block Spam Email, Passwordless login, Hide Login, Magic Login – User Verification <= 2.0.44 - Authentication Bypass to Account Takeover

Post Grid and Gutenberg Blocks 2.2.85 - 2.3.3 - Unauthenticated Privilege Escalation

Product Designer <= 1.0.36 - Authenticated (Author+) Stored Cross-Site Scripting via SVG File Upload

Post Grid and Gutenberg Blocks 2.2.87 - 2.2.90 - Authenticated (Subscriber+) Privilege Escalation

Gutenberg Blocks, Page Builder – ComboBlocks <= 2.2.87 - Authenticated (Contributor+) Stored Cross-Site Scripting via Accordion Block

Affected Vendor

pickplugins

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Affected Software

Post Grid

Vulnerable Versions:

0

Timeline

Official Publish: January 11th, 2024

Last Modified: April 8th, 2026

Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1189 Drive-by Compromise

T1059.007 JavaScript

T1539 Steal Web Session Cookie

T1213 Data from Information Repositories

T1567 Exfiltration Over Web Service

T1491.001 Defacement