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CVE-2026-15826critical

WordPress Plugin Flaw Exposes 40,000 Sites to Admin Takeover

A critical vulnerability in the WordPress User Profile Builder plugin, affecting over 40,000 sites, allows unauthenticated attackers to gain administrator access. The flaw, CVE-2026-15826, stems from a type confusion error that can trick the plugin into granting administrative privileges if specific configurations are met, such as the administrator using user ID 1 and automatic login after registration being enabled. The plugin developer has released a patch, version 3.16.5, to address the issue.