The plugin register. Used on 4 million+ sites

WP Mail SMTP by WPForms

4known security flaws found in WP Mail SMTP by WPForms
since September 2018

Safe from 4.1.0

Version 4.1.0 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: Cross-site scripting, September 2018Advisory: Cross-site scripting, December 2018Advisory: Information leak, July 202420182020202220242026

DangerousMajorMinorAdvisory

What they could let someone do.

What could happen

  • Cross-site scripting

    Someone could make your pages run their own script in visitors' browsers, to steal logins, show a fake payment form or send people to a scam site.

    How: The software puts text it was sent back onto a page without making it safe first, so a script hidden in a link, form or comment runs as if it were part of your site.

    Read about it here
  • Information leak

    It could give away information that should stay private, such as user details, file locations or settings, which makes other attacks easier.

    How: The software shows, sends or logs more than it should.

Every known flaw, newest first (4)
  1. July 2024AdvisoryInformation leakFixed in 4.1.0. Needs a login on the site (Admin+).
  2. December 2018AdvisoryCross-site scriptingFixed in 1.4.0.
  3. September 2018AdvisoryCross-site scriptingFixed in 1.4.0.
  4. Date not knownAdvisoryCross-site scriptingFixed in 1.4.0.

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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