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BackWPup

22known security flaws found in BackWPup
since February 2011

Safe from 5.7.7

Version 5.7.7 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, February 2011Advisory: Reading files, March 2011Advisory: Running code, March 2011Advisory: a security flaw, October 2011Advisory: Cross-site scripting, June 2013Advisory: a security flaw, May 2015Advisory: a security flaw, March 2017Major: Reading files, September 2017Advisory: a security flaw, September 2017Major: Reading files, November 2023Major: Information leak, December 2023Advisory: Information leak, February 2024Minor: Reading files, August 2024Minor: Missing checks, October 2025Major: Missing checks, February 2026Advisory: Running code, April 2026Major: Cross-site scripting, July 2026Advisory: Missing checks, July 2026Advisory: Reading files, October 2026Advisory: Missing checks, October 2026Advisory: Information leak, October 202620112013201520172019202120232025

DangerousMajorMinorAdvisory

What they could let someone do.

What could happen

  • Reading files

    Someone could read files on the server they should never see, such as the settings file holding the database password, or delete files the site needs.

    How: The software takes a file name from a request and does not check that it stays inside its own folder.

    Read about it here
  • 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
  • Information leak

    It could give away information that should stay private, such as user details, file locations or settings, which makes other attacks easier.

    How: The software shows, sends or logs more than it should.

Every known flaw, newest first (22)
  1. October 2026AdvisoryReading filesFixed in 5.7.7. Needs a login on the site (Administrator+).
  2. October 2026AdvisoryMissing checksFixed in 5.7.7.
  3. October 2026AdvisoryInformation leakFixed in 5.7.7. No login needed.
  4. July 2026MajorCross-site scriptingFixed in 5.7.5. No login needed.
  5. July 2026AdvisoryMissing checksFixed in 5.7.5.
  6. April 2026AdvisoryRunning codeFixed in 5.6.7. Needs a login on the site (Administrator+).
  7. February 2026MajorMissing checksFixed in 5.6.3. Needs a login on the site (BackWPup Helper+).
  8. October 2025MinorMissing checksFixed in 5.5.1. Needs a login on the site.
  9. August 2024MinorReading filesFixed in 4.0.2. Needs a login on the site (Administrator+).
  10. February 2024AdvisoryInformation leakFixed in 4.0.3. Needs a login on the site.
  11. December 2023MajorInformation leakFixed in 4.0.4. No login needed.
  12. November 2023MajorReading filesFixed in 4.0.2. Needs a login on the site (Administrator+).
  13. September 2017AdvisoryA security flawFixed in 3.4.2.
  14. September 2017MajorReading filesFixed in 3.4.2. No login needed.
  15. March 2017AdvisoryA security flawFixed in 3.3.
  16. May 2015AdvisoryA security flawFixed in 1.7.2.
  17. June 2013AdvisoryCross-site scriptingFixed in 3.0.13.
  18. October 2011AdvisoryA security flawFixed in 2.1.5.
  19. March 2011AdvisoryRunning codeFixed in 1.7.2.
  20. March 2011AdvisoryReading filesFixed in 1.4.1.
  21. February 2011AdvisoryA security flawFixed in 1.5.
  22. Date not knownAdvisoryA security flawFixed in 2.1.5.

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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