WordPress 3 vulnerabilities

Is the W3 Total Cache plugin safe?

Below are the known, publicly disclosed vulnerabilities of the W3 Total Cache (WordPress) component. If you use it on your site, check the version and update it before the flaw gets exploited.

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Known vulnerabilities

Wysoka · CVSS 7.2 CVE-2026-78438 September 5, 2026

W3 Total Cache: cross-site scripting (XSS)

Cross-site scripting (XSS) w komponencie W3 Total Cache. Ocena zagrożenia: Wysoka (CVSS 7.2). Zaktualizuj podatny komponent do najnowszej wersji lub tymczasowo go wyłącz.

Details and what to do → Source (NVD) ↗
Wysoka · CVSS 7.2 CVE-2026-18109 August 14, 2026

W3 Total Cache: cross-site scripting (XSS)

Cross-site scripting (XSS) w komponencie W3 Total Cache. Ocena zagrożenia: Wysoka (CVSS 7.2). Zaktualizuj podatny komponent do najnowszej wersji lub tymczasowo go wyłącz.

Details and what to do → Source (NVD) ↗
Wysoka · CVSS 7.5 CVE-2026-9282 July 11, 2026

W3 Total Cache: przechodzenie po katalogach

Przechodzenie po katalogach w komponencie W3 Total Cache. Ocena zagrożenia: Wysoka (CVSS 7.5). Zaktualizuj podatny komponent do najnowszej wersji lub tymczasowo go wyłącz.

Details and what to do → Source (NVD) ↗

How to check whether this affects you

  • Check the installed version of the W3 Total Cache component in the admin panel.
  • Compare it with the fixed version noted in the details of the relevant vulnerability above.
  • If your version is older, update the component to the latest available.
  • If a fix has not been released yet, temporarily disable the vulnerable element and watch your logs.
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