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Blocksy Companion

19known security flaws found in Blocksy Companion
since February 2022

Safe from 2.1.59

Version 2.1.59 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: Forged requests, February 2022Advisory: Information leak, February 2022Minor: Missing checks, March 2022Minor: Cross-site scripting, January 2023Minor: Missing checks, April 2023Major: Cross-site scripting, July 2023Minor: Cross-site scripting, March 2024Major: Forged requests, April 2024Minor: Cross-site scripting, May 2024Minor: Server side request forgery, May 2024Minor: Cross-site scripting, September 2025Minor: Cross-site scripting, October 2025Major: Running code, November 2025Minor: Cross-site scripting, June 2026Dangerous: Running code, July 2026Minor: Cross-site scripting, July 2026Dangerous: Running code, July 2026Minor: Missing checks, August 2026Dangerous: Missing checks, September 202620222023202420252026

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
  • 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
Every known flaw, newest first (19)
  1. September 2026DangerousMissing checksFixed in 2.1.59. No login needed.
  2. August 2026MinorMissing checksFixed in 2.1.56. No login needed.
  3. July 2026DangerousRunning codeFixed in 2.1.47. No login needed.
  4. July 2026DangerousRunning codeFixed in 2.1.47. No login needed.
  5. July 2026MinorCross-site scriptingFixed in 2.1.52. Needs a login on the site (Author+).
  6. June 2026MinorCross-site scriptingFixed in 2.1.46. Needs a login on the site (Editor+).
  7. November 2025MajorRunning codeFixed in 2.1.20. Needs a login on the site (Author+).
  8. October 2025MinorCross-site scriptingFixed in 2.1.15. Needs a login on the site (Contributor+).
  9. September 2025MinorCross-site scriptingFixed in 2.1.11. Needs a login on the site (Contributor+).
  10. May 2024MinorServer side request forgeryFixed in 2.0.43. Needs a login on the site.
  11. May 2024MinorCross-site scriptingFixed in 2.0.46. Needs a login on the site (Contributor+).
  12. April 2024MajorForged requestsFixed in 2.0.29. No login needed.
  13. March 2024MinorCross-site scriptingFixed in 2.0.32. Needs a login on the site (Contributor+).
  14. July 2023MajorCross-site scriptingFixed in 1.8.47. No login needed.
  15. April 2023MinorMissing checksFixed in 1.8.82. Needs a login on the site.
  16. January 2023MinorCross-site scriptingFixed in 1.8.68. Needs a login on the site.
  17. March 2022MinorMissing checksFixed in 1.8.20. Needs a login on the site.
  18. February 2022AdvisoryForged requestsFixed in 1.8.20.
  19. February 2022AdvisoryInformation leakFixed in 1.8.20.

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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