Threat intelligence

User Session Synchronizer <= 1.4.0 - Unauthenticated Authentication Bypass to Account Takeover via 'ussync-key', 'ussync-token', and 'ussync-ref' Parameters

CVE-2026-15341 · user-session-synchronizer

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

Vulnerability: User Session Synchronizer <= 1.4.0 - Unauthenticated Authentication Bypass to Account Takeover via 'ussync-key', 'ussync-token', and 'ussync-ref' Parameters
Affected software: user-session-synchronizer(Plugin)
Affected versions: ≤ 1.4.0
Authentication: Unauthenticated
Vulnerability type: Authentication bypass
CVE: CVE-2026-15341
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 cbc32e6d-47c5-4050-ba77-5a54203fe56a). Methodology and redistribution notes

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