Stored Cross-Site Scripting Vulnerability in WordPress Plugin by Vendor
CVE-2026-0894

6.4MEDIUM

Key Information:

Vendor

WordPress
Status
Content Blocks (custom Post Widget)
Vendor
CVE Published:
18 April 2026

What is CVE-2026-0894?

The Content Blocks (Custom Post Widget) plugin for WordPress is susceptible to Stored Cross-Site Scripting due to inadequate input sanitization and output escaping on user-generated content. This vulnerability allows authenticated users with contributor-level access and higher to inject malicious scripts into web pages. These scripts can be executed whenever other users access the affected pages, posing significant risks to the integrity of the website and exposing user data.

Affected Version(s)

Content Blocks (Custom Post Widget) 0 <= 3.3.9

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/changeset/3447914/cust...

CVSS V3.1

Score:
6.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Muhammad Yudha - DJ
.