Threat intelligence

W3 Total Cache <= 2.10.3 - Unauthenticated Stored Cross-Site Scripting via Comment Author Name

CVE-2026-18109 · w3-total-cache

Important: Seeing this vulnerability listed does not mean your website is affected. Exposure depends on whether you run W3 Total Cache at a vulnerable version. How SiteRespond intelligence works

Vulnerability: W3 Total Cache <= 2.10.3 - Unauthenticated Stored Cross-Site Scripting via Comment Author Name
Affected software: w3-total-cache(Plugin)
Affected versions: ≤ 2.10.3
Authentication: Unauthenticated
Vulnerability type: Cross-site scripting
CVE: CVE-2026-18109
Published: 13 August 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 16ac73ae-6a0a-4c9b-8830-e0745061e587). Methodology and redistribution notes

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