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    CVE-2026-110290

    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.

    Published:Oct 16, 2026
    Last Modified:Oct 16, 2026
    EPS:Oct 16, 2026
    EPSS Score:0.00206
    CVSS Score:6.4

    Affected Products

    No affected product recorded yet

    Exploits

    No exploit reference

    Common Vulnerability Scoring System

    Attack Vector
    Network
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    Privileges Required
    None
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    High
    User Interaction
    None
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    Scope
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    Changed
    Confidentiality
    None
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    Integrity
    None
    Low
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    Availability
    None
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    High