CVE-2026-15100 | The Post Grid Gutenberg Blocks – PostX plugin for WordPress … | CVSS 6.4 MEDIUM

Description

The Post Grid Gutenberg Blocks – PostX plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'searchnoresult' Block Attribute in all versions up to, and including, 5.0.32 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is particularly concerning in a cross-privilege scenario where a Contributor creates a pending or draft post containing the malicious block attribute, which then executes arbitrary JavaScript in the browser session of an Editor or Administrator who previews that post.

Metadata

CVE ID: CVE-2026-15100
State: PUBLISHED
Assigner: Wordfence
Reserved: 2026-07-08 16:48 UTC
Published: 2026-07-24 02:31 UTC
Last updated: 2026-07-24 02:31 UTC
Primary CWE: CWE-79
CWE-79 Improper Neutralization of Input During Web Page Gene…
Vendor / Product: wpxpo / Post Grid Gutenberg Blocks – PostX
Sources: cve.org · NVD

Severity & Metrics

6.4 MEDIUM CVSS 3.1

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

Affected products (1)

Vendor	Product	Platform	Versions
wpxpo	Post Grid Gutenberg Blocks – PostX	—	0 ≤ 5.0.32

Weakness (CWE)

CWE	Source	Description
CWE-79	cna	CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSS scores (1)

Score	Severity	Version	Source	Vector
6.4	MEDIUM	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

References (5)