CVE-2026-0894

MEDIUM EPSS 9.3%

Published Apr 18, 20262mo ago · Modified Jun 17, 20261w ago

6.4 CVSS 3.1

Medium

Published Apr 18, 2026 2mo ago

Last Modified Jun 17, 2026 1w ago

Description

The Content Blocks (Custom Post Widget) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's content_block shortcode in all versions up to, and including, 3.3.9 due to insufficient input sanitization and output escaping on user supplied values consumed from user-created content blocks. 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.

CVSS Details

Base Score

6.4

Exploitability

3.1

Impact

2.7

Vector string

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

Attack Vector Network

Attack Complexity Low

Privileges Required Low

User Interaction None

Scope Changed

Confidentiality Low

Integrity Low

Availability None

Threat Intelligence

EPSS Exploit Probability

9.3% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-79 Cross-site Scripting Injection

References 2

plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset/3447914/custom-post-widget
wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/246dee15-82e0-4630-8d95-d2419e9eaef8?source=cve

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.