Mendbird
Menu

The plugin register. Used on 800,000+ sites

Autoptimize

19known security flaws found in Autoptimize
since June 2017

Safe from 3.1.16

Version 3.1.16 or later fixes all of them. A site on an older version is open to them.

Or let us look for you

Free, with no sign up. About ten seconds, and nothing on your site is touched. See an example report

When they were found.

Advisory: Reading files, June 2017Major: Running code, August 2020Minor: Cross-site scripting, October 2020Dangerous: Running code, October 2020Major: Running code, October 2020Advisory: Cross-site scripting, May 2021Minor: Cross-site scripting, May 2021Minor: Cross-site scripting, July 2022Minor: Missing checks, December 2022Advisory: Cross-site scripting, April 2023Advisory: Cross-site scripting, April 2023Minor: Cross-site scripting, April 2023Minor: Cross-site scripting, December 2025Advisory: Cross-site scripting, March 2026Advisory: Cross-site scripting, March 2026Advisory: Cross-site scripting, April 2026Major: Cross-site scripting, April 2026Minor: Cross-site scripting, September 202620172019202120232025

DangerousMajorMinorAdvisory

What they could let someone do.

What could happen

  • Running code

    Someone could run their own code on the server and take the site over: add malware, send spam, steal data, or use it to attack others.

    How: Part of the software treats something it was sent as instructions to follow, or keeps an uploaded file somewhere it can be run.

    Read about it here
  • 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
  • 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 (19)
  1. September 2026MinorCross-site scriptingFixed in 3.1.16. No login needed.
  2. April 2026AdvisoryCross-site scriptingFixed in 3.1.15.
  3. April 2026MajorCross-site scriptingFixed in 3.1.16. No login needed.
  4. March 2026AdvisoryCross-site scriptingFixed in 3.1.15. Needs a login on the site (Contributor+).
  5. March 2026AdvisoryCross-site scriptingFixed in 3.1.15. Needs a login on the site (Contributor+).
  6. December 2025MinorCross-site scriptingFixed in 3.1.14. Needs a login on the site (Contributor+).
  7. April 2023AdvisoryCross-site scriptingFixed in 3.1.7.
  8. April 2023MinorCross-site scriptingFixed in 3.1.7. Needs a login on the site (Admin+).
  9. April 2023AdvisoryCross-site scriptingFixed in 3.1.7.
  10. December 2022MinorMissing checksFixed in 3.1.0. No login needed.
  11. July 2022MinorCross-site scriptingFixed in 3.1.1. Needs a login on the site.
  12. May 2021MinorCross-site scriptingFixed in 2.8.4. Needs a login on the site.
  13. May 2021AdvisoryCross-site scriptingFixed in 2.8.4.
  14. October 2020MinorCross-site scriptingFixed in 2.7.8. Needs a login on the site.
  15. October 2020DangerousRunning codeFixed in 2.7.8. No login needed.
  16. October 2020MajorRunning codeFixed in 2.7.8. No login needed.
  17. August 2020MajorRunning codeFixed in 2.7.7. Needs a login on the site.
  18. June 2017AdvisoryReading filesFixed in 2.1.1. No login needed.
  19. Date not knownAdvisoryInformation leakFixed in 3.1.0.

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

Be told the day a new one is found.

Mendbird checks your site every morning against the lists of known flaws, and emails you in plain English the day one hits something you run. Free for 14 days, then £9 a month.

Start my free trial