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Gutenberg

12known security flaws found in Gutenberg
since March 2022

1 with no fix yet

Version 21.9.0 or later fixes the others. One has no fix yet. A site on an older version is open to them.

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When they were found.

Advisory: Cross-site scripting, March 2022Advisory: a security flaw, March 2022Advisory: Cross-site scripting, July 2022Advisory: Cross-site scripting, October 2022Minor: Cross-site scripting, October 2022Minor: Cross-site scripting, October 2023Advisory: Cross-site scripting, April 2024Minor: Cross-site scripting, July 2024Minor: Cross-site scripting, October 202520222023202420252026

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
Every known flaw, newest first (12)
  1. October 2025MinorCross-site scriptingFixed in 21.9.0. Needs a login on the site.
  2. July 2024MinorCross-site scriptingFixed in 18.6.1. Needs a login on the site.
  3. April 2024AdvisoryCross-site scripting No login needed.
  4. October 2023MinorCross-site scriptingFixed in 16.8.1. Needs a login on the site.
  5. October 2022AdvisoryCross-site scriptingFixed in 14.3.1.
  6. October 2022MinorCross-site scriptingFixed in 14.3.1. No login needed.
  7. July 2022AdvisoryCross-site scriptingNo fix yet. Needs a login on the site.
  8. March 2022AdvisoryCross-site scriptingFixed in 12.7.2.
  9. March 2022AdvisoryA security flawFixed in 12.7.2.
  10. Date not knownAdvisoryCross-site scriptingFixed in 14.3.1.
  11. Date not knownAdvisoryCross-site scriptingFixed in 16.8.1.
  12. Date not knownAdvisoryCross-site scripting

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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