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Slider, Gallery, and Carousel by MetaSlider

20known security flaws found in Slider, Gallery, and Carousel by MetaSlider
since July 2014

Safe from 3.111.1

Version 3.111.1 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, July 2014Advisory: a security flaw, August 2014Advisory: a security flaw, October 2015Advisory: Cross-site scripting, August 2020Advisory: Cross-site scripting, September 2020Minor: Cross-site scripting, September 2022Minor: Cross-site scripting, March 2023Minor: Forged requests, March 2023Advisory: Cross-site scripting, March 2023Minor: Cross-site scripting, April 2024Minor: Forged requests, November 2024Dangerous: Running code, February 2025Advisory: Cross-site scripting, March 2025Advisory: Cross-site scripting, March 2025Minor: Cross-site scripting, June 2025Major: Running code, April 2026Major: Running code, April 2026Minor: Cross-site scripting, April 20262014201620182020202220242026

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
  • Forged requests

    Someone could get a signed in administrator to change something without knowing, such as adding a new admin or changing settings, just by visiting a page.

    How: The software does not check that a change came from its own pages, so another site can quietly send one through the administrator's browser.

    Read about it here
Every known flaw, newest first (20)
  1. April 2026MajorRunning codeFixed in 3.107.0. Needs a login on the site (Editor+).
  2. April 2026MajorRunning codeFixed in 3.107.0. Needs a login on the site (Editor+).
  3. April 2026MinorCross-site scriptingFixed in 3.111.1. Needs a login on the site (Author+).
  4. June 2025MinorCross-site scriptingFixed in 3.99.0. Needs a login on the site (Contributor+).
  5. March 2025AdvisoryCross-site scriptingFixed in 3.95.0. Needs a login on the site.
  6. March 2025AdvisoryCross-site scriptingFixed in 3.95.0. Needs a login on the site.
  7. February 2025DangerousRunning codeFixed in 3.95.0. No login needed.
  8. November 2024MinorForged requestsFixed in 3.92.1. No login needed.
  9. April 2024MinorCross-site scriptingFixed in 3.70.1. Needs a login on the site (Contributor+).
  10. March 2023AdvisoryCross-site scriptingFixed in 3.29.1.
  11. March 2023MinorForged requestsFixed in 3.28.1. No login needed.
  12. March 2023MinorCross-site scriptingFixed in 3.29.1. No login needed.
  13. September 2022MinorCross-site scriptingFixed in 3.27.9. Needs a login on the site (Administrator+).
  14. September 2020AdvisoryCross-site scriptingFixed in 3.17.2.
  15. August 2020AdvisoryCross-site scriptingFixed in 3.17.2.
  16. October 2015AdvisoryA security flawFixed in 2.2.
  17. August 2014AdvisoryA security flawFixed in 2.2.
  18. July 2014AdvisoryCross-site scriptingFixed in 2.6.
  19. Date not knownAdvisoryCross-site scriptingFixed in 3.17.2.
  20. Date not knownAdvisoryA security flawFixed in 2.2.

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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