CVE Feed

    Dashboard / CVE / CVE-2026-8981

    CVE-2026-8981

    The Custom Block Builder WordPress plugin before 4.3.0 does not consistently check the unfiltered_html capability across all paths that write to its block template code fields, allowing administrators on multisite installations (or single-site installs with DISALLOW_UNFILTERED_HTML defined) to inject arbitrary JavaScript that executes for any visitor of pages embedding the affected block.

    Published:Jun 9, 2026
    Last Modified:Jun 9, 2026
    EPS:Jun 9, 2026
    EPSS Score:
    CVSS Score:3.5

    Affected Products

    Vendor
    Custom Block Builder
    Product
    Custom Block Builder
    Vendor
    Wordpress
    Product
    Wordpress

    Exploits

    No exploit reference

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High