CVE-2026-110290 Details
Description
The WebberZone Top 10 — Popular Posts plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'other_attributes (parsed to inject instance_id) + undeclared is_widget' parameter in all versions up to, and including, 4.5.2 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. The exploit requires setting the undeclared is_widget flag to '1' via block JSON, which activates the vulnerable code path that concatenates the attacker-controlled instance_id value into an unescaped HTML class attribute.
A stored cross-site scripting vulnerability has been identified in the WebberZone Top 10 Popular Posts plugin for WordPress, affecting all versions through 4.5.2. The issue arises from inadequate input sanitization and output escaping, allowing authenticated attackers with contributor-level access and above to inject arbitrary scripts. The injected scripts execute when a user accesses the compromised page. Exploitation requires the attacker to set the undeclared is_widget flag to '1' via block JSON, which triggers the vulnerable code path that adds the attacker-controlled instance_id value into an unescaped HTML class attribute.
Users are advised to update the WebberZone Top 10 Popular Posts plugin to version 4.5.3 or a newer patched version.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 16, 2026CISA-ADP
Assessed Oct 16, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| WebberZone Top 10 | <= 4.5.2 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 16, 2026 | CVE Modified | CISA-ADP |
| Oct 16, 2026 | New CVE Received | [email protected] |