Threat intelligence

Perfmatters <= 2.6.4 - Unauthenticated Stored Cross-Site Scripting

CVE-2026-57671 · perfmatters

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

Vulnerability: Perfmatters <= 2.6.4 - Unauthenticated Stored Cross-Site Scripting
Affected software: perfmatters(Plugin)
Affected versions: ≤ 2.6.4
Authentication: Unauthenticated
Vulnerability type: Cross-site scripting
CVE: CVE-2026-57671
Published: 30 June 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 94dcaa35-f39f-4e8b-a57c-78343520cca6). Methodology and redistribution notes

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