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CMP

19known security flaws found in CMP
since August 2020

Safe from 4.1.21

Version 4.1.21 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: a security flaw, August 2020Advisory: a security flaw, August 2020Advisory: a security flaw, August 2020Major: Missing checks, August 2020Advisory: Running code, May 2021Advisory: Cross-site scripting, May 2021Minor: Missing checks, January 2022Minor: Information leak, March 2023Minor: Missing checks, April 2023Minor: Server side request forgery, March 2024Advisory: Running code, April 2025Major: Running code, April 2026Advisory: Cross-site scripting, August 2026Advisory: Missing checks, August 2026Advisory: Missing checks, August 2026Major: Missing checks, August 2026Minor: Missing checks, October 2026Minor: Missing checks, October 20262020202120222023202420252026

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
  • Server side request forgery

    Someone could make your server fetch addresses for them, reaching services that are meant to be private.

    How: The software fetches an address it was sent without checking where it points.

Every known flaw, newest first (19)
  1. October 2026MinorMissing checksFixed in 4.1.21. No login needed.
  2. October 2026MinorMissing checksFixed in 4.1.20. No login needed.
  3. August 2026MajorMissing checksFixed in 4.1.18. Needs a login on the site (Editor+).
  4. August 2026AdvisoryCross-site scriptingFixed in 4.1.18. Needs a login on the site (Editor+).
  5. August 2026AdvisoryMissing checksFixed in 4.1.18. Needs a login on the site (Editor+).
  6. August 2026AdvisoryMissing checksFixed in 4.1.18. No login needed.
  7. April 2026MajorRunning codeFixed in 4.1.17. Needs a login on the site (Administrator+).
  8. April 2025AdvisoryRunning codeFixed in 4.1.15.
  9. March 2024MinorServer side request forgeryFixed in 4.1.11. Needs a login on the site.
  10. April 2023MinorMissing checksFixed in 4.1.8. No login needed.
  11. March 2023MinorInformation leakFixed in 4.1.7. No login needed.
  12. January 2022MinorMissing checksFixed in 4.0.19. No login needed.
  13. May 2021AdvisoryRunning codeFixed in 4.0.10.
  14. May 2021AdvisoryCross-site scriptingFixed in 4.0.10.
  15. August 2020AdvisoryA security flawFixed in 3.8.2.
  16. August 2020AdvisoryA security flawFixed in 3.8.2. No login needed.
  17. August 2020AdvisoryA security flawFixed in 3.8.2. No login needed.
  18. August 2020MajorMissing checksFixed in 3.8.2. No login needed.
  19. Date not knownAdvisoryForged requestsFixed in 3.8.2.

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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