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ShortPixel Image Optimizer

15known security flaws found in ShortPixel Image Optimizer
since June 2022

Safe from 6.6.0

Version 6.6.0 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, June 2022Advisory: Cross-site scripting, June 2022Advisory: Running code, September 2023Advisory: Database injection, September 2023Major: Database injection, October 2024Minor: Missing checks, October 2024Minor: Missing checks, October 2025Advisory: Reading files, February 2026Advisory: Cross-site scripting, March 2026Major: Running code, April 2026Major: Running code, April 2026Minor: Running code, September 2026Minor: Cross-site scripting, September 202620222023202420252026

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
  • 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
  • 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 (15)
  1. September 2026MinorCross-site scriptingFixed in 6.6.0. Needs a login on the site (Contributor+).
  2. September 2026MinorRunning codeFixed in 6.5.6. Needs a login on the site (Subscriber+).
  3. April 2026MajorRunning codeFixed in 6.4.4. Needs a login on the site (Author+).
  4. April 2026MajorRunning codeFixed in 6.5.6. Needs a login on the site (Author+).
  5. March 2026AdvisoryCross-site scriptingFixed in 6.4.4. Needs a login on the site (Author+).
  6. February 2026AdvisoryReading filesFixed in 6.4.3. Needs a login on the site (Editor+).
  7. October 2025MinorMissing checksFixed in 6.3.5. Needs a login on the site.
  8. October 2024MajorDatabase injectionFixed in 5.6.4. Needs a login on the site.
  9. October 2024MinorMissing checksFixed in 5.6.4. Needs a login on the site.
  10. September 2023AdvisoryDatabase injectionFixed in 5.4.2.
  11. September 2023AdvisoryRunning codeFixed in 5.4.2.
  12. June 2022AdvisoryCross-site scriptingFixed in 4.22.10.
  13. June 2022AdvisoryCross-site scriptingFixed in 4.22.10.
  14. Date not knownAdvisoryCross-site scriptingFixed in 4.22.10.
  15. Date not knownAdvisoryRunning codeFixed in 5.4.2.

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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