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Mailchimp for WooCommerce

7known security flaws found in Mailchimp for WooCommerce
since November 2017

Safe from 6.3

Version 6.3 or later fixes all of them. A site on an older version is open to them.

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When they were found.

Advisory: Reading files, November 2017Minor: Server side request forgery, August 2022Advisory: Server side request forgery, August 2022Major: Database injection, August 2026Advisory: Missing checks, August 2026Advisory: Missing checks, September 2026Advisory: Missing checks, September 202620172019202120232025

DangerousMajorMinorAdvisory

What they could let someone do.

What could happen

  • Database injection

    Someone could read or change what is in the site's database: customer details, orders, password records, or a new administrator account.

    How: The software builds its questions to the database out of what visitors type, so carefully written input changes the question itself.

    Read about it here
  • Server side request forgery

    Someone could make your server fetch addresses for them, reaching services that are meant to be private.

    How: The software fetches an address it was sent without checking where it points.

  • Missing checks

    Someone could do things only an administrator should: change settings, see private data, or give themselves more rights.

    How: Part of the software forgets to check who is asking before it does what was asked.

    Read about it here
Every known flaw, newest first (7)
  1. September 2026AdvisoryMissing checksFixed in 6.3.
  2. September 2026AdvisoryMissing checksFixed in 6.3. No login needed.
  3. August 2026MajorDatabase injectionFixed in 6.2. Needs a login on the site.
  4. August 2026AdvisoryMissing checksFixed in 6.1.1.
  5. August 2022MinorServer side request forgeryFixed in 2.7.1. Needs a login on the site.
  6. August 2022AdvisoryServer side request forgeryFixed in 2.7.2. Needs a login on the site.
  7. November 2017AdvisoryReading filesFixed in 2.1.2.

From the public lists of known flaws, checked daily. A flaw is listed once it is made public, often after a fix is out.

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