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Fluent Forms

47known security flaws found in Fluent Forms
since June 2021

Safe from 6.2.16

Version 6.2.16 or later fixes all of them. A site on an older version is open to them.

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When they were found.

Major: Cross-site scripting, June 2021Dangerous: a security flaw, October 2022Minor: Cross-site scripting, March 2023Minor: Database injection, July 2023Minor: Missing checks, September 2023Minor: Cross-site scripting, January 2024Advisory: Cross-site scripting, January 2024Minor: Cross-site scripting, March 2024Major: Missing checks, May 2024Dangerous: Missing checks, May 2024Minor: Cross-site scripting, May 2024Minor: Cross-site scripting, May 2024Major: Running code, May 2024Minor: Cross-site scripting, July 2024Minor: Cross-site scripting, July 2024Minor: Cross-site scripting, July 2024Minor: Cross-site scripting, July 2024Minor: Missing checks, August 2024Minor: Cross-site scripting, October 2024Minor: Cross-site scripting, November 2024Major: Cross-site scripting, December 2024Minor: a security flaw, March 2025Minor: Cross-site scripting, April 2025Minor: Running code, September 2025Minor: Missing checks, December 2025Minor: Missing checks, January 2026Minor: Running code, January 2026Minor: Missing checks, January 2026Advisory: Cross-site scripting, February 2026Minor: Missing checks, April 2026Minor: Reading files, May 2026Minor: Cross-site scripting, May 2026Major: Missing checks, May 2026Major: Missing checks, May 2026Advisory: Missing checks, July 2026Advisory: Missing checks, July 2026Minor: Missing checks, July 2026Major: Cross-site scripting, July 2026Advisory: Cross-site scripting, July 2026Minor: Missing checks, July 2026Minor: Cross-site scripting, July 2026Major: Cross-site scripting, July 2026Minor: Cross-site scripting, October 2026Minor: a security flaw, October 2026Minor: Cross-site scripting, October 2026Minor: Missing checks, October 2026Minor: Missing checks, October 2026202120222023202420252026

DangerousMajorMinorAdvisory

What they could let someone do.

What could happen

  • 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
  • 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
  • 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
Every known flaw, newest first (47)
  1. October 2026MinorCross-site scriptingFixed in 6.2.15. No login needed.
  2. October 2026MinorMissing checksFixed in 6.2.6. Needs a login on the site (Custom+).
  3. October 2026MinorMissing checksFixed in 6.2.16. No login needed.
  4. October 2026MinorCross-site scriptingFixed in 6.2.15. Needs a login on the site (Contributor+).
  5. October 2026MinorA security flawFixed in 6.2.15. No login needed.
  6. July 2026MinorCross-site scriptingFixed in 6.2.9. No login needed.
  7. July 2026MajorCross-site scriptingFixed in 6.2.12. No login needed.
  8. July 2026AdvisoryCross-site scriptingFixed in 6.2.6. Needs a login on the site (Contributor+).
  9. July 2026MinorMissing checksFixed in 6.2.9. No login needed.
  10. July 2026MajorCross-site scriptingFixed in 6.2.8. No login needed.
  11. July 2026MinorMissing checksFixed in 6.2.2. Needs a login on the site (Subscriber+).
  12. July 2026AdvisoryMissing checksFixed in 6.2.5. Needs a login on the site (Form Manager+).
  13. July 2026AdvisoryMissing checksFixed in 6.2.1. Needs a login on the site (Subscriber+).
  14. May 2026MajorMissing checksFixed in 6.2.0. No login needed.
  15. May 2026MajorMissing checksFixed in 6.2.1. No login needed.
  16. May 2026MinorCross-site scriptingFixed in 6.2.2. Needs a login on the site (Contributor+).
  17. May 2026MinorReading filesFixed in 6.2.2. Needs a login on the site (Administrator+).
  18. April 2026MinorMissing checksFixed in 6.2.0. No login needed.
  19. February 2026AdvisoryCross-site scriptingFixed in 6.1.15. Needs a login on the site (Subscriber+).
  20. January 2026MinorMissing checksFixed in 6.1.15. Needs a login on the site.
  21. January 2026MinorRunning codeFixed in 6.1.12. No login needed.
  22. January 2026MinorMissing checksFixed in 6.1.8. No login needed.
  23. December 2025MinorMissing checksFixed in 6.1.8. No login needed.
  24. September 2025MinorRunning codeFixed in 6.1.2. Needs a login on the site (Subscriber+).
  25. April 2025MinorCross-site scriptingFixed in 6.0.3. Needs a login on the site (Contributor+).
  26. March 2025MinorA security flawFixed in 6.0.0. No login needed.
  27. December 2024MajorCross-site scriptingFixed in 5.2.7. No login needed.
  28. November 2024MinorCross-site scriptingFixed in 5.2.1. No login needed.
  29. October 2024MinorCross-site scriptingFixed in 5.1.20. Needs a login on the site (Form Manager+).
  30. August 2024MinorMissing checksFixed in 5.1.19. Needs a login on the site (Subscriber+).
  31. July 2024MinorCross-site scriptingFixed in 5.1.20. Needs a login on the site (Administrator+).
  32. July 2024MinorCross-site scriptingFixed in 5.1.20. Needs a login on the site (Subscriber+).
  33. July 2024MinorCross-site scriptingFixed in 5.1.20. Needs a login on the site (Administrator+).
  34. July 2024MinorCross-site scriptingFixed in 5.1.20. Needs a login on the site (Administrator+).
  35. May 2024MajorRunning codeFixed in 5.1.16. Needs a login on the site.
  36. May 2024MajorMissing checksFixed in 5.1.17. No login needed.
  37. May 2024DangerousMissing checksFixed in 5.1.17. No login needed.
  38. May 2024MinorCross-site scriptingFixed in 5.1.14. Needs a login on the site (Subscriber+).
  39. May 2024MinorCross-site scriptingFixed in 5.1.17. Needs a login on the site (Contributor+).
  40. March 2024MinorCross-site scriptingFixed in 5.1.10. Needs a login on the site (Contributor+).
  41. January 2024AdvisoryCross-site scriptingFixed in 5.1.7.
  42. January 2024MinorCross-site scriptingFixed in 5.1.7. Needs a login on the site.
  43. September 2023MinorMissing checksFixed in 5.0.9. No login needed.
  44. July 2023MinorDatabase injectionFixed in 5.0.0. Needs a login on the site.
  45. March 2023MinorCross-site scriptingFixed in 4.3.25. Needs a login on the site.
  46. October 2022DangerousA security flawFixed in 4.3.13. No login needed.
  47. June 2021MajorCross-site scriptingFixed in 3.6.67. No login needed.

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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