Title: SameSite issue
Last modified: February 19, 2026

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# SameSite issue

 *  [Stefan Groenveld](https://wordpress.org/support/users/stefangroenveld/)
 * (@stefangroenveld)
 * [3 months, 2 weeks ago](https://wordpress.org/support/topic/samesite-issue/)
 * Hi, my browsers developer mode shows me the following
 * “This Set-Cookie header didn’t specify a “SameSite” attribute and was defaulted
   to “SameSite=Lax,” and was blocked because it came from a cross-site response
   which was not the response to a top-level navigation. The Set-Cookie had to have
   been set with “SameSite=None” to enable cross-site usage.”
 * According to my analysis, the problem occurs when resources from your domains(
   e.g. the tracking pixel / METIS API) are loaded in the frontend. The browser 
   treats this as a cross-site request and blocks the set cookie because the Set-
   Cookie header does not contain an explicit “SameSite=None; Secure”.
 * Important points:
    - I cannot adjust these header settings in the WordPress plugin or via content
      security policy because the set-cookie header comes directly from your server.
    - Modern browsers interpret missing SameSite information as “SameSite=Lax” and
      then do not allow the cookie in embedded/cross-site contexts.
 * My request to you:
 * Can you check whether the cookies set by your servers for METIS / VG WORT can
   be adjusted in the HTTP response header as follows:
 * Set-Cookie: name=value; Path=/; SameSite=None; Secure
 * This is the only way to ensure that the cookies can be used reliably in current
   browsers in a cross-site scenario.
 * Thank you in advance! Best regards, Stefan

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## Tags

 * [Set-Cookie](https://wordpress.org/support/topic-tag/set-cookie/)

 * 0 replies
 * 1 participant
 * Last reply from: [Stefan Groenveld](https://wordpress.org/support/users/stefangroenveld/)
 * Last activity: [3 months, 2 weeks ago](https://wordpress.org/support/topic/samesite-issue/)
 * Status: not resolved