Threat intelligence

User Profile Builder <= 3.16.4 - Unauthenticated Authentication Bypass via Type Confusion to Administrator Account Takeover via 'username' Parameter

CVE-2026-15826 · profile-builder

Important: Seeing this vulnerability listed does not mean your website is affected. Exposure depends on whether you run Profile Builder at a vulnerable version. How SiteRespond intelligence works

Vulnerability: User Profile Builder <= 3.16.4 - Unauthenticated Authentication Bypass via Type Confusion to Administrator Account Takeover via 'username' Parameter
Affected software: profile-builder(Plugin)
Affected versions: ≤ 3.16.4
Authentication: Unauthenticated
Vulnerability type: Authentication bypass
CVE: CVE-2026-15826
Published: 14 August 2026
CISA KEV: Not listed in CISA KEV at last catalog refresh
Impact: May allow access to accounts or admin areas without valid credentials.
Source: Data imported from Wordfence Intelligence (advisory 9f606fba-f779-42ea-a160-6c3b20dc5e79). Methodology and redistribution notes

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