Threat intelligence

Meta pixel for WordPress <= 5.2.1 - Unauthenticated Stored Cross-Site Scripting

CVE-2026-66705 · official-facebook-pixel

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

Vulnerability: Meta pixel for WordPress <= 5.2.1 - Unauthenticated Stored Cross-Site Scripting
Affected software: official-facebook-pixel(Plugin)
Affected versions: ≤ 5.2.1
Authentication: Unauthenticated
Vulnerability type: Cross-site scripting
CVE: CVE-2026-66705
Published: 31 July 2026
CISA KEV: Not listed in CISA KEV at last catalog refresh
Impact: May allow attackers to run scripts in visitors' browsers or hijack admin sessions.
Source: Data imported from Wordfence Intelligence (advisory b0c12678-1d91-4916-aa11-20292d9e384b). Methodology and redistribution notes

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