Stored Cross-Site Scripting in WebberZone Top 10 - Popular Posts Plugin
CVE-2026-110290

6.4MEDIUM

Key Information:

Vendor

WordPress
Status
Webberzone Top 10 — Popular Posts
Vendor
CVE Published:
16 October 2026

What is CVE-2026-110290?

The WebberZone Top 10 - Popular Posts plugin for WordPress has a vulnerability that allows authenticated attackers with contributor-level access or higher to exploit stored Cross-Site Scripting (XSS) via the 'other_attributes (parsed to inject instance_id) + undeclared is_widget' parameter. This flaw arises from inadequate input sanitization and output escaping, enabling attackers to inject arbitrary scripts that execute when other users access compromised pages. The vulnerability is triggered by setting the undeclared is_widget flag to '1' through block JSON, which leads to the concatenation of malicious instance_id values into an unescaped HTML class attribute.

Affected Version(s)

WebberZone Top 10 — Popular Posts 0 <= 4.5.2

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/top-10/tags/4....
https://plugins.trac.wordpress.org/browser/top-10/tags/4....

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

Wordfence PRISM
.